Return of Reckoning

Can someone advice me next thing: for IB 2H is better to get "healers debaff", or take a +"parry skill"
Thanks!
Why im asking: my usual tactic is to dive to healers, and hold -50% outgong healing on much enemy healers as possible, think it is the best input in heal debaffing. From the other hand i ...

Tnx for answer! I understand, but first skill costs grudges, so i thought it may be addition, not replacement

So we have Ancestors Fury and Inspiring Attack, both boosts STR. But effects not stack, is this bug?