We just did this achievement yesterday. It wasnt really a dps fight, we did it even without a shaman, that means no melee buffs, and no bloodlust.
Our setup was:
- Holy Paladin (Fong)
- Discipline Priest (Akashi)
- Resto Druid (Bami)
- Prot. Warrior (Arees)
- Frost Mage (Selenia)
- Combat Rogue (Ibackstabuqq)
- Arms Warrior (Gfx)
- Fury Warrior (Endzeit)
- Feral DPS Druid (Zuuc)
This fight is not a dps race, its a survival and a healing fight which requires the least overhealing possible.
We choose to make 2 camps, 1 melee camp, which is on the boss 100%, and 1 caster camp, @ max range from the boss.
After 4 minutes or so, when all the vapors have spawnd, Vezax will create an add. This add has 2 million hitpoints and we let our warrior tank it aswell, he will get more dmg from that point on.
We managed to create a tactic in which our 3 healers were on 85% mana when the add spawnd.
Holy paladin point of view: We let the Holy paladin walk with the melee. If the holy paladin is with the caster group, he has to move to much due to shadowcrashes and marks. When he was @ the melee group he almost didnt have to move at all, only during kiting, but the tank wont get any dmg. The Healing from the paladin was almost 100% flash of light. Because the tank had Hots and shields on him, the paladin only healed when the tank was below 75% to minimise overhealing.
Discipline priest point of view: Now it gets interesting. The Resto druid and the Discipline do benefit from the black puddles. Basically what the discipline priest does: When a puddle is up, he goes into the puddle, and casts a shield on the main tank. that shield absorbs the same as if you would be standing out of the puddle, but it has its mana cost reduced by 70%. Then, i dont know much about discipline priests, but a discipline priest can gain procs in which his penance is a free cast. At those moments he uses penance. But be sure to not stand in the black puddle, cause the healing output will be reduced by 70% aswell.
So basically: Stand in puddles to spam shields for 70% mana reduced, and get out of them asap for penance or flash of light.
Resto druid point of view: This is even more interesting, i never healed this fight before, i was always boomkin, i thought resto druids would suck to the max cause of the small mana pool, and the immense spirit regen, and the new lifebloom mechanic. I was FALSE. I was topping healing meters, and my mana was just not going empty! First of all. I used the Rejuvenation idol which has a ~140 reduced mana cost on Rejuvenation. Also, i used the Spark of Hope trinket. Which reduces mana cost by all my spells by 42 mana.
At the start of the fight, hot up the tank with Rejuvenation and Regrowth. Cause of the discipline priest and the Flash of light spam at some points this will be enough. Wait for a Black puddle. When the Black puddle lands, stand in it, and stack 3 lifeblooms on the maintank. The funny thing is that the healing over time done by lifebloom IS reduced by the black puddle, but the end bloom IS NOT reduced by the black puddle, that still does ~11k non crit on the maintank. This only seems to happen for the maintank.
I was doing some math for this phase:lifebloom costs 744 mana. normally, when u stack 1 lifebloom, and it ends, it gives back ~488 mana. But during this fight, 1 lifebloom only gives back ~244 mana for some reason.
Then, when u stand in a black puddle, the cost of spells is reduced by 70%. That means my lifebloom only costs 223 mana! And still when it blooms, it will give me 244 mana back!
I tried spamming lifeblooms on the entire raid, cause i thought it would give me more mana back then it costs, but this doenst seem to work. I wasnt gaining mana, i was slowly dying on mana. REALLY SLOWLY.
So basically as a resto druid: Hot the tank up with Rejuvenation 100% (be sure to NOT stand in a black puddle) When a black puddle lands, get into the puddle, and hot the tank with 3x lifebloom, you can also spam lifeblooms on raid members who took little dmg from the drain life. Then get out of the puddle, and be ready to cast a regrowth IF the tank gets low. When the lifebloom ends on the maintank, get in the puddle again and stack 3 more. Just repeat and your mana wont be below 80% when the add spawns.