Hi there folks,
Relics procs of the same type shouldn't stack, and we have this bug fixed for Game Update 2.1.1. Because the fix is still in testing, there's always the chance that it will be moved to a different patch. If so, I'll be sure to let you know!
So it will be even tougher to deal with healers. Is that something you plan on dealing with in 2.1.1?