When you finish killing all the mana worms, you're at the bitchiest boss in the entire game. Seriously, this guy sucks. When he spawns his little sparks give you a nasty debuff which stacks and increases the damage done to you. If you have more than one of these, you die very quickly.
Fortunately, the debuff also makes you bigger, so now we can exploit stuffs. As you enter the room, look to your left. There are a row of lamps. Go to the lamp closest to the boss and stand between that and the wall. Now, you can kill every add without worrying about getting more than one stack of the Debuff.
Why does this work? Things like Bloodlust, which make your character bigger, could be used to force a character outside a wall and crazysploit stuff. Therefore, when the games sees that you're next to a wall, it will cancel the buff before you fall outside. Pics coming after Mag raid.