If a war sits on their stacks in deliverance, it's a dps loss by not fell cleaving, but if you misjudge and use stacks, you won't be able to get the mitigation from IB on stance change, potentially killing you.
^ you gotta make this call ~8 cooldowns max in advance

To avoid a dps penalty, pld needs to anticipate a max of 3 cooldowns, and if you misjudge, you *might* take a dps hit...
QQ combo break.