well, I tried it against Calla to see if there will be any increase in defence. turned out I didn’t have enough OA w/o Oleron to proc AM reliably so the fight was even worse.
for regular content or sr - maybe Bulwark may be better in some cases (or unless you find OA elsewhere)
btw, I need to remake this build since vampiric gargabol has abysmal chances to be dropped.