With my paladin i solve this by getting pissed, healing myself for 50 ( lay on hands, all the points in 1 go ), transforming ( the celestial thing ), and start disarming them. The ranger knows the cue and will kill them so hard for it haha.

If that doesnt work, smite that fucker for trying to damage me that much. If not hitting at all ( my ac is 23 lawl )