Finally beat Coil turn 4, was surprisingly easy once we tried a different method. Rather than kiting Soldiers/Knights, etc., we just had our main tank hold the 2 Dreanaughts while we burned all of the adds on the last phase.
For the rest of the weekend I basically just farmed up Fire, Water and Lightning shards inbetween a few LoL games. The new game mode (One for All, I think), is pretty silly.