Blessing does not work on oob, sacrament adds +40 dmg max only. No extra hit, no holy dmg type bonus.
Priest/sadhu does not work together at all. Esp with mass heal/resurrect/heal requiring decent positioning to use.
Nor is stone skin reliable enough to block enough attacks to safely use oob.
Mace + Arde dagger could work, but you’d still get a drastic dmg reduction from enemies magic defenses.
And the monk defense skills are channels, so you can’t attack during them with other monk skills. Meaning it just delays while oob deals ■■■■ dmg.
tl/dr: no.
Even the korean article states it is not a good combination. But i’m not entirely sure what the first line is saying.
Either way using oob > astral body explosion to agro would be decent, and prakriti for positioning/healing.
But that’s it.