I have been using my lock. I just run through the entire instance casting 2 instant dots on each mob... siphon life and curse of agony. On the abbots add corruption. I kill the entire dungon in the time it takes me to run to every mob. Takes 10 minutes a run. I have tried the seed of corruption thing but for the first two sections the time it takes to gather them up I could have killed them all the other way. once you get in the cathedral you can send in a VW on boss, wait untill they are all aggroed on him and try to get off 3 SoC before the VW dies... good luck on that. If it works then you kill like 50 mobs at once, if it fails you will die.