Ah, that makes a lot of sense. I run 1x Paladin 4x DKs, so can't use the blinding light round robin, so Repentance is my go-to.
I assume you run into diminishing return issues sometimes?

Since I have 4x battle rezes, I don't mind wasting Divine Shield to make the stairs faster and its only a 5min cool down. I think to get up all the stairs and clear all the trash to the next boss takes at least that long.

I agree, 10 minute pot timer sucks, it used to be much shorter and would reset based on combat status back in the day. FTL.