I feel like all this could have been avoided if we had a less explicitly Chaotic healer... then again, the name of the game is explicitly Chaos alignment, after all, and infighting is to be expected.

As for replacement characters, [@Sophrus] (and anyone else who requires it), there are always those cultists that dragged Lucius along with them. I'm sure at least one has survived long enough to get the favour of the Chaos Gods, and therefore the attention of the players if they happen to need a replacement character or two...