I'm still fairly new, so I'll comm someone if they've been helpful with explaining mechanics or something similar. Doesn't even have to be to me; one of the last comms I gave was to someone explaining a boss to another sprout. I'm also learning to tank, so my second priority is the healer for keeping me alive.

Finally, I' ll comm anyone sticking around at the end long enough to, if the first two choices split before I could.