A L24 Kensai with Celestial Fury is pretty good against them. If they can't move, they can't hurt you.
I suppose it helps even more when the Kensai is duelled to a mage, and cast timestop. Improved haste. Stoneskin (useful useful useful). Summons (any).
Etc etc. These guys are so easy to get on with, just take your time with them, no hurry eh
