Instance: Ahn'Kahet: The Old Kingdom (Heroic)
Box: Prot Pally, 3 frost mages, 1 resto druid
Gear level: Heroic blue/epic & crafted gear
Difficulty: Easy once I found out how to kill the last boss. Last boss would have been really Hard without the trick.
Guide: I did not do the following bosses: Jedoga Shadowseeker & Amanitar. There was nothing on them I wanted. My goal was the tank bracers from the final boss. The instance is not to bad since I ran it many times on normal while I was leveling. Some of the trash packs can give you a challenge. Having a poison cleanse totem would really help in this place. Swapping shadow & frost resist aura helps on many fights. My main path is to kill the two bugs as you walk in. Then kill the two pathing spiders. You can walk up the stairs leaving the side packs alone. I make my way to the right stairs then down to the left. This will lead you to the Elder Nakox room. From there you go out his room and down the stairs. Taking this path cuts out several trash packs from being killed in the run.

Elder Nakox: Pretty easy fight if you have aoe abilities. I have my group bunch up on me and then step back alittle as I tank the boss. Consecration usually keeps the spiders on me. If some start attacking the group I just arcane explosion and they die. The key to this fight is a macro to target the /target Ahn'Kahar Guardian. While I am tanking I am spamming that key as well. This key has nothing bound on the rest of my group. Once he spawns and I target him I taunt it to me. My group switches targets and kills him fast. After that its back to the big bug. Just repeat this and he should die. The key is killing that spawn. If you can target him and kill him the encounter is easy.

Prince Taldaram: This guy is easy. I turn on fire resist aura for his little ball of flames attack. I setup the same way as the Nakox with my group just behind me. You dps him hard until he vanishes. Once he vanishes I arcane explosion to get him out of stealth. You can use any aoe even consecration. All you have to do is target him and make sure your group faces him. DPS as normal and he should eventually die. This is a rinse and repeat boss as well. Its similar to having to target the guardian by having to knock him out of stealth and retargeting him for dps. Just repeat and the fight is over.

Herald Volazj: Very hard until I found out the easy way to do it. I was trying to do him like I did on normal. The problem I had was my druid was spamming instant heals to full health so that didnt work. What I did was kill my mages and 2 man him with my pally and druid. He has around 400k health so it took me two insanity phases to kill him. By doing it this way the insanity phase is a joke. I would auto attack my druid with my pally and just throw a rejuv up on the druid every now and then. The phase will end and its back to dps. If you have a pally put up shadow resist. Rolling 3 lifeblooms 1 rejuv and 1 regrowth seemed to keep my pally full. I would throw a rejuv and a wildgrowth on my druid if he needed it. The healing required was very minor. Just dps him until he dies and collect your epics. Lucky for me the bracers dropped my first run. I never have to go back unless he is the daily heroic quest.

Hope this guide helps. I would suggest killing the flamestrike mobs and the elemental air mobs first that lead to the last boss. They do nasty aoe so killing them first helps.