Best Potencial Combo DBG+ARROW?

Ignore PDR is useful for every class except Mercedes (and Buccaneers) because You attack quickly enough for Guard Crash to proc fairly often.
(I actually can't recall the speed for Fist Enrage on Buccs so I admit I might be wrong there.)

I thought it proc'd per hit and not per attack because some of the hits end up significantly higher than the rest of them.

Either way though, PDR isn't that great for them.