Mask of Vital Contradiction and Soulstitch Vessel doesn't appear to work together. I'm getting insane amounts of heals. But no +water drop thingy from the Vessel.
If one player has Whipwood Tendrils and the others has Bubble Coat. It sets of an infinite loop that puts both players to 0 health instantly. But at least in my case. The person with the Whipwood tendrils counts as losing the match.
Edit: The above infinite also happened with Bubble Coat when I didn't have anything that feasibly should have been able to go infinite with it. The only on hit trigger I had was Phasing Flail. So think maybe it is some kind of more universal on hit infinite issue.
Edit2: By adding the fatigue legs the double phasing Divinity strat is now even more busted than it already was. You basically two-shot most builds while healing infinite.