So I re-read some of the strats and I think one key thing we were missing is that on the 3 set of marks, someone needs to stand in his hit box on top of the arrows and do some sort of cooldown or be bop'd to eat the physical damage. Afterward that person needs to be healed like crazy through the dot.
I also don't think that the marks were being absorbed by the tank every time on the first two times. Just need to tighten that up as well as other little shit like stepping on bombs and what not. Third, for the balcony phases outside of maybe the first two, the healer should really stay up while we clear them. Lastly, after 3 tanks (and 3 sets (of 3) marks), we should ignore the balconies completely, still take kite and take marks to tank but don't dps it, and hard burn the boss to phase to 30.