Cata - Glory of the Cataclysm Hero
Feels like it might be about time to get working on this - I'll update as people respond with their own advice and experiences. I haven't yet boxed any heroics, so I'm currently just looking to compile other people's strategies, etc.
UPDATE - Maat has responded with his own personal strategies, broken down by Instance.
Easy
Cataclysm Dungeon Hero - If you can clear the Heroics, then you get this, obviously.
Ready for Raiding - Strafe and use IWT
Rat Pack - This is cumulative - As long as you kill a few rats each time you go, you'll get this eventually.
Prototype Prodigy - Turns out this is quite easy now, with a ranged group and 4.2 gear. You may not even need a healer. Park DPS (and healer) on the top balcony on the far right on the front corner, so they can dps the Reaper as it comes up the ramp. Face your toons in such a way that they can dps the entire 180 degrees left/right in front of them, so that you can ping pong the Reaper back and forth.
It's Frost Damage - Easy if you LOS the Coalesces by using the cabin. Note that you must SURVIVE to get this achievement, but do not need to kill the boss. Maat reported getting knocked into the water and got this while waiting to wipe.
I'm on a Diet - Not too hard if you just circle strafe around him and don't eat bad food. Or eat a good food after a bad one.
Kill It With Fire! - The achievement requires you to kill three soul fragments which have the burning soul debuff. The burning soul debuff is gained when they move over a flame patch left by the phoenixes in phase 1. Just kite the purple bird in such a way that the soul fragments path through the fire, then kill them. Note that you don't have to kill all 3 in one trip. As long as you kill the boss, you'll get credit for only doing 1 or 2 burning souls.
Pardon Denied - Again, with 4.2 gear, this is pretty easy now. If you pop Hero/etc, you should only need to interrupt once.
To the Ground! - With 4.2 gear. this is a joke. Pop Hero/Bloodlust/Time Warp and you can kill the boss before the first wave ever spawns.
Bullet Time - I would guess this is mainly a gear check on your tank and healer. Should be easy in principle with good gear and healing. Maat mentions he had to do 3 waves of ghouls. This may be a cumulative achievement, meaning you can get this over multiple runs. (not verified)
Prince of Tides - Should be relatively easy and mainly just a gear check - Tank/kite the Unyielding Behemoth until phase 3, then kill it. Keep your team close, so when he is doing his cone attack, you can turn it away fast from your team.
Umbrage for Umbriss - CC the Malignant Trogg, burn the boss down to 10-15%, pull the boss next to the Malignant Trogg, kill the Trogg, then kill the boss within 20 seconds.
Too Hot to Handle - Easiest way to do this is to park your dps and healer in one spot, then have your tank drag the boss back and forth through the central pillar every so often (usually when there is 5 sec left on quicksilver armor). If you time it right, you'll get 2-3 stacks each time and hit 15 around the time you kill him. May take a few tries to get the timing down.
Faster Than the Speed of Light - Should be fairly easy now with 4.2 gear - Note that you need about 21 seconds left on the timer when you kill the last elemental (you don't need to kill or engage the boss) to allow time for the role-play to finish.
Straw That Broke the Camel's Back - All you need to do here is strafe/move when Ptah is going to use an ability where you're standing, as his abilities will dismount you.
Sun of a.... - Mainly a DPS check. One option that might help is to pull him far from the center of his room, so it takes him longer to walk back and recharge.
No Static at All - All you need to do is jump at the right time.
Extra Credit Bonus Stage - Extremely easy - There are more than 5 hidden around the zone. Just click on 5 of them to get this.
Rotten to the Core - Pull boss FIRST (from the side), wait for her to land (shield gets removed), then pull the groups and AE them all down at once.
Medium
Vigorous VanCleef Vindicator - Hard DPS and skill check if you do this the legit way. Easier if you cheese it with the warlock or shaman trick (let the worgen kill the people in the 4th part, but have a SS lock or Shaman run to the boss at the end, then rez when you wipe from the worgen killing the first person)
Headed South - Easiest way to do this is to not kill the melee adds as they spawn. Only kill the caster adds. Then when the 3rd melee add spawns, kill it, then kill the first 2 melee adds and then kill the boss. Note that this achievement is PER TOON.
Acrocalypse Now - Difficulty will depend on your choice of tactics and your class and gear. If you chose to just tank all the adds until you have 20, you'll need very good tank gear and possibly 2 healers as well. The other option is to kite the adds with a dps toon like a mage.
Old Faithful - Hex the caster adds, tank the big one to 50%, then kill the small adds one by one. Once the boss is active again, drag the big add to the blue circle that appears on the ground when she's about to do her geyser. May need to pop cooldowns on the tank while doing this.
Don't Need to Break Eggs to Make an Omelet - You can slow the adds, but you can't root or thunderstorm them.
Crushing Bones and Cracking Skulls - Having a pally tank with glyphed Holy Wrath will make this easier. Quake will spawn elementals. Tank needs to collect the elementals, then when the boss gets to 66% you DPS chains of woe, root/stun the elementals near the boss, then the boss does skullcracker. Repeat again at 33%.
Hard
Arrested Development - You will have to make sure you only allow one at a time to evolve and make sure to interrupt both the boss and the Evolved Dragonkin when they each cast Shadow Strike.
Ascendant Descending - You basically just need a class that can slow or root the adds - tank the boss in the middle and kite in a big circle around the outside edge. The difficulty of boxing this will depend on your class makeup.
I Hate That Song - This seems like it would be well nigh impossible to box. The best option I've read about is for the tank to pick up the snakes BEFORE you engage (they don't respawn until killed), dps the boss down, leave the tank and healer up top and run a dps down to each lever. If somehow you can manage to never kill the snakes, you can repeat the process for the 2nd lever pull. But you might need to be really well geared and/or have 2 healers to manage this.
My progression and feedback on Cata - Glory of the Cataclysm Hero
This is with my 1 prot pala 1 resto druid 3 elemental shaman team
Legend:
Easy
Medium
Hard
Lost City of The Tol'Vir
Headed South Keep 3 melee add alive. DPS boss down to ~10% (I know it has damage reduction shield). It will take a while. When boss at ~10% kill the 1st two melee adds, then pop bloodlust when you are in a central position, kill 3rd add, it'll remove the bosses aura, then kill boss. This way it is pretty easy to get the achievement on all toons at the same time.
Kill It With Fire! Drag the fire bird in a line, then position your team at one end of the line, your tank at the other. This way when add spawns from your team they go through the fire gaining the debuff so you can kill them. Note: There is no add name Burning Souls, you have to kill those shadowy images when they stand in fire.
Acrocalypse NowI had to make a button that does no attack, also had to make sure my toons don't attack when I taunt. The "difficulty" of this achievment is not killing any small crocks by mistakes. When you get the 5th wave you just pop all CD and aoe them down.
Deadmines
Ready for Raiding Extremely easy, just strafe when the firewall is up.
Rat Pack You just need to survive for a while. Every time someone gets picked up and charged into the timber, rats spawn. Try to be close by and aoe them down quick if you want to get the achievement done in one kill.
Prototype Prodigy Extremely easy with current gear (~465 ilevel) and ranged team.
It's Frost Damage After 1st knock, I got knocked into water, then while I was waiting to wipe, I've got the achievement. Pretty weird. I guess if you don't want to wipe then you have to stay inside the cabin.
I'm on a Diet Just burn the boss down, don't bother with the food, strafe out of the aoe.
Vigorous VanCleef Vindicator What I did is get to the part after those lightning orb walls. Once you get outside, just mount up, start running towards the boss. When you get wiped because you didn't save the NPCs, just ankh, mount up and keep running to the boss, pull her and you get achievement.
Shadowfang Keep
Pardon Deniad Popped bloodlust at pull, only had to interrupt once.
To the Ground! Popped bloodlust at pull, boss was dead as the 1st wave of adds spawned. Didn't have to interrupt anything
Bullet Time Always decurse if you fail to interrupt. When ghouls spawn I used consecration to gather them, then some kind of cooldown every time I moved into the pistol barrage. Had to do 3 waves of ghouls. If you keep rest of team close to boss then they can get away with very little movement to avoid pistol barrage, I mostly just run through the boss then hit follow to make them face boss again.
Throne of the Tides
Old faithful I just hexed both caster adds, tanked big add at about 50% HP, while killing small adds one by one. Then when boss come again I just moved big add into a pool while using cooldown on tank.
Prince of Tides Keep the big add alive. Keep your team close, so when he is doing his cone attack you can turn it away fast from your team.
Grim Batol
Umbrage for Umbriss Crowd control the purple add then dps boss down to ~10%. Kill crowd controlled add on top of boss, then kill boss.
Don't Need to Break Eggs to Make an Omelet Key is to have some kind of slow and save cooldowns for when adds come. Slow them and kill them before they start to channel
Blackrock Caverns
Crushing Bones and Cracking Skulls After killing the chains, quickly move out with follow, then move back in, as you turn around just make your toons turn manually. I didn't even need to use cooldown on tank.
Arrested Development This one surprisingly only required 4 wipes. What I did was have 1 dps and tank soak beams. Tank took middle, dps took right one. When first add transforms, I interrupt it then kill it, while keeping an eye on my debuff (tank). If you move like that you move in with your tank first into the beam then with your dps, then you basically only have to keep track of one buff, because you move them one by one manually. Once first add is dead stop soaking the beam with the dps, let that add get transformed while managing the beam on the tank. Don't forget to interrupt 2nd transformed add as it transforms. After 2nd add is dead it's a cake. In case you forget to interrupt just use a tank cooldown and heal up. Also having some boss mod for the fear cast is useful so you get some kind of sound warning when you need to pop a tremor, I think grounding might work too, but I didn't bother to make sure that it does.
Too Hot to Handle Really easy, just do as you'd normally do. Stack boss up to like 8 on first go, then move out dps him till stack is about to drop off, then push the stacks up 2 by 2 till you reach 15-16. This way it is easy to heal up the party.
Ascendant Descending The hardest so far. What I did was place the 3 shamans in a triangle for earthbind totem. Have the resto druid constantly root one add. Then run around in a circle with the tank draggin the two adds and the boss. Making sure I have both taunts up for every 33%. The challenging part is the random factor when the adds just turn away for no apparent reason and then you get stunned while an add is close to you.
Halls of Origination
Faster Than the Speed of Light Had this done ages ago, just don't pull extra packs and kill bosses fast, gear check pretty much.
I hate that Song Starting positions looked like this. Healer + 1 Dps middle of bridge, 1 - 1 DPS on either stairs (in a way so they only have to move forwards towards the levers). Pala tank with retribution aura and spamming holy wrath runs and gathers the snakes before engaging the boss. I used divine protection as I was running back to pull boss. Pull boss as soon as in range and position tank in middle of bridge but a bit in front of the 1 healer and 1 dps, do a consecration for a bit of extra threat. As boss reaches 70% hp, I use click to move on the 1 - 1 dps standing on the stairs to move them to the levers. When boss reaches 66% I'm already ready to click the levers. As boss becomes interrupt-able I use Avenger's Shield to interrupt the boss. Now I pop bloodlust and dps the boss down to 33%. Click levers again and finish the boss off. The benefit of this positioning is that from the Tanks main window you can see all of your toons, if any of them gets the blue flame under them you just strafe out of it (I strafe with all at the same time), just make sure you strafe opposing directions every blue frame. Once left once right, so your healer + 1 dps doesn't fall off the bridge. Needless to say you have to keep your eye out for dispelling too.
Straw That Broke the Camel's Back Strafe out of every possible thing.
Sun of a.... I got this a while ago without even really trying. If you have all cooldowns you can probably do this easy.
Vortex Pinnacle
No Static at All Jump!
Extra Credit Bonus Stage If you have problem finding them just go to wowhead and read a couple of comments.
Stonecore
Rotten to the Core Pull the boss from the side without agroing the small adds in front of her. When she lands aka her shields gets removed pull all the 3 groups of the small adds and quickly aoe them down.
I'll keep adding my tactics as I progress through Glory of the Cataclysm Hero
