Continuing on his way to soloing everything ever, Sheya is sticking with his Warlock and heading into Blackwing Descent and the big worm goes down first!
Glyphs: Soul Shard, Siphon Life & Demon Hunting
Use Curse of Enfeeblement on Magmaw, drain soul the whole time (MG only if you are sure that your pet isn't going to die) and keep your pet alive! Let your pet die when it got hit by mangle and resummon a new one. One Soulburn: Seed of Corruption is enough to kill the parasites and just let the seed dot trigger the explosion.