I think it will be fine. Anecdotally, clearing somewhere between 70-80 runs of Titania/Innocence Ex, I've noticed the gap between tanks/heals damage is minimal on average but the gap between tanks/heals and DPS is massive. That's where I think it should be. in 4.x, a really good tank would often beat the lowest DPS and fight for 3rd or 4th place...but I dont see that happening any more in a smooth run.