I didn't see a thread for this, so here's one.

My team is only level 86, so this is just for normal, but I'm happy enough that I've got the fights down.

My techniques:

Wise Mari: Kill the spawns and then run your team up to the wall behind Mari and just eat the water blast & heal up (hard at 85 with fresh 372ish gear, easy at 86 with 390+ gear). If you can't manage to heal through it, you can have your team run in circles (avoiding the water if you can) and nuke, healing as you get a chance. Takes forever that way, but it's doable.

2nd boss will be luck of the draw: Each time I basically just nuked them and healed through it. First time was at 85 with an average ilvl of 372 for my team, second time was at 86 with 390 average.

3rd boss: Position your DPS & Heals so that they avoid the waves that spawn and burn the boss down until it becomes a dragon. Move your team out of the void zones the dragon will spawn and burn it down. This fight is hard if you are fresh 85, but really easy when you have some gear and a level.

4th and final boss: This one I could not do at 85 because my DPS just wasn't good enough and killing the boss required me to not make any mistakes on debuffing, stop DPSing to heal, and etc. Also, this boss seemed to aggro right as my character crossed into the room, causing the door to close and sometimes locking characters out. So, my strategy for the Sha of Doubt is:

1) Pull it into the courtyard in front of the boss room, causing it to de-spawn.
2) Once the boss has de-spawned, run my team into its room and position them in a clump wherever convenient, and wait for it to re-spawn.
3) Nuke the boss, and be sure to IMMEDIATELY dispel the debuff it casts on one of your teammates.
4) The boss will disappear and summon adds - one for each of your party. You should be in a clump and just AoE burn them down ASAP; if you don't, they can explode (hurting you and healing the boss)
5) Repeat 3 and 4, collect loot when done.