Can someone weigh in on ogryn shield bulids and blessings for havoc?

>brutal momentum
The +15% weakspot damage seem strong, but I don't think I'm killing enough things with direct damage for ignoring hitmass to matter.
>skullcrusher
Seems like the obvious choice with how much stagger is thrown around, especially chorus, but now also concussive. Likely less good when there's an arbitrator running it.
>opportunist
I figured this might be worth taking since a huge portion of my damage is bleed, and 25% rending on the bleed makes it quite strong against armor.
>confident strike
Seems like shit, the shield likes heavy attacks too much anyway.

I'm curious as to whether there's any way of getting the shield to cleave better, because it feels like even the H1 doesn't hit enough targets. Carapace seems to reliably stop the hit from continuing, even with heavy hitter + cleaver fully stacked up. There's obviously the crits ignore hit mass blessing, but that would mean making a super retarded build for only 20% chance to giga cleave and being taxed 3 points in the process.