A question first: has anyone tested the -resists on the new renewed sunders in PVP? Do they effectively lower other players resistances like a rainbow facet does?
A tested answer second: I have stacked level 48 blood oath and did not see a noticeable difference in my pvp damage received. I believe it's possible that just hard points are counted in the absorb percentage on Warlock.
I also have a level 54 bind demon, I wonder if he'll do any better in PvP than my old skellies / wolves with zero AR did. Will try to test this also in the future!
yeah they work
and you're correct on blood oath--only hard points