This mod is really fun and all, but online seems... kinda broken. In the non-functional way. My friends and I seemed to frequently encounter monsters that wouldn't stay dead. We'd kill them, we would get the exp for the kill, and the monster would respawn with low health. There also seemed to be a lot of rubber banding problems, which haven't happened in vanilla or with the Terraria Leveled mod. There's also that online half of Acolyte's functionality is broken, as I can't use Blessing on anyone but myself. I see the animation for it affecting others, but they don't get the buffs. Offline, it's fine though.
As for Heal... if functions fine, but this is where my opinion creeps in and says it's clunky. Is it not possible to make it auto-target the lowest HP person on screen? It would be much more streamlined that way. Also it'd be kinda nice to heal NPCs, but I suppose that's just me.
There's also the fact that the UI completely breaks when I log back into a server. I can't switch between the stats, class, etc tabs. That was something that greatly irked me. I had to go level up in order to fix the problem. Also, are you supposed to lose the skill points earned as the Terrarian (I call it Novice) class when you switch to another class?