Well, the most recent holy DPS build I had in mind was heavily Disc too - deep enough to get Power Infusion - but even with that I don't see anything to offset the losses I talked about above.

Even if I went all the way down to Pain Suppression, I'd only gain a few more points in survivability that I perhaps wouldn't even need if I had more offensive output.

I'm pretty much making this up as I go along, and thinking out loud, so feel free to set me straight.