If done correctly you don't need any fear or healing I think. As long as you can keep aggro off for 8 seconds then you win. And almost everything in the blast radius will be dead, the only thing that will live are shadow immune mobs and stuff with more than ~33K HP. And the only 5-man mobs I know of with more HP than that are bosses and the single pull mobs like Fel Overseer in Shadow Lab, or the bog giants in Steamvault (which you wouldn't be hitting with this anyhow).


Here is how I envision this working...

Pre-target 5 mobs and pull with pet on each one. Each warlock will cast 4 Seed of Corruption on 4 different mobs, so that each mob gets 4 seeds. They will be cast so that each mob gets 1 seed, then 2, then 3, then 4. This will allow the 4 seeds to stack up before the explosions start going off, to hopefully keep aggro on the pets as long as possible. If done correctly then each mob will take the explosion damage from 16 Seed of Corruption. The fight would last <10 seconds, I'm not sure if the pets + warlocks can all stay alive but it seems likely to me... a Voidwalker can handle several hits from a single mob even in Heroics before dying.

Here's a timeline...

T=0 Pet attacks, taunt, start casting Seed #1
T=2.0 pet on passive, finish cast Seed #1, start casting Seed #2
T=4.0 finish cast Seed #2, start casting Seed #3
T=5.0 Seed #1 ticks
T=6.0 finish cast Seed #3, start casting Seed #4
T=7.0 Seed #2 ticks, might get aggro
T=8.0 seed #1 ticks, finish cast Seed #4, cast Curse of Shadows, might get aggro
T=9.0 Seed #3 ticks and explodes Seed #1, definitely get aggro
T=9.5 cast Shadowburn to explode the remaining seeds, everything dies.
T=10 collect loot

Damage calculations...

Seed of Corruption damage: 1044/18, 1200 average AoE
Spell damage coefficient: DoT effect 150%, AoE effect 22%
Curse of Shadows: +13%
Shadow Mastery: +10%
Contagion: +5%

Seed of Corruption DoT damage needs to stay below 348/tick to to enable us to land 4 seeds. This is around +500 spell damage including Shadow Mastery and Contagion:
((1044 base + (500 damage x 1.5 coefficient)) x 1.1 shadow mastery x 1.05 contagion) / 6 ticks = 345 damage per tick.


Explosion damage with +500 damage, Curse of Shadows, Shadow Mastery, Contagion, arbitrary 20% crit rate: ~1710 average
(1200 + (500 x .22)) x 1.13 x 1.1 x 1.05 x 1.2 = ~2052

Each mob will take the damage of 16 explosions, which is ~32800 damage. Additionally the Seed-ed mobs will take ~2000 from the SoC DoT damage and Shadowburn.


One more interesting thing is the 4 piece bonus from Oblivion set which adds 180 to the explosion damage, assuming it's added to the base damage so that modifiers affect it then it is ~282 per explosion (~4500 in all). This would push the total over 40000 damage.



It is possibly better to go with higher spell damage which will only allow for 3 seeds, I'll rework the math for that later on.