So i've started running some double healer and we are not doing very well, usually unable to score much kills especially against druid healer teams. Should we try and set up CC chains or what should our general play style be?
You must understand that this comp is for "fun" (and sadism) and not for viability.
The tactic is too muck about until the enemy healer ooms and then go "OMG ROAR", but obviously some healers can't oom. This is where the mana burns come in.