[Sever]

These guys have only ever been a pain in the @$$ with improved Golems installed. If you have a fighter in your party, just equip them with a +3 weapon (Lilarcor is good) and take 'em out one at a time. You'll need a weapon that delivers blunt damage for the clay golems though.

With improved Torgal, the third flail head does not reside in the old chapel. You'll still want to kill them, though, as the weapons they guard are too good to go without.