huh. I wonder/think its leech on both accounts. My Frostblades pathfinder. pathfinder gets 8% elem dr. That 8%+75% resist, could do both phys and elem reflect with little issue. Elem reflect would have some spikes. But, sapphire flask and she was without a care in the world. I even wondered if when I got a belly, she would be able to do mirror atziri comfortably.
Did you have leech on the elementalist?
that is what I would pinpoint to for all my rips. Both the Shieldcharge, and elementalist. SC had poor damage, but a ton of raw life/regen. but also no leech, was pathing over to duelist leech, before getting annoying with the character. Elementalist, has a ton of damage. Stormcall/orb. But also, no leech. (A bit now with wand craft.) so she has the damage to slaughter, but any damage taken is hits to mana, and life, using pots to replenish. And what leech there is, is a bit meh. orb of storms is for dual curse. deals very little damage to leech. Stormcall does, but bursts, and is not constant.
I have little doubt the FB pathfinder would wreck Breaches. the aoe clear, and dual leech.