I don't tend to keep Keldorn in my party, since I like having Viconia. And I play a Cavalier Paladin, so I rock Carsomyr.
True, Flail of Ages is better, but I give that to Anomen or Minsc. Minsc packing the Flail of Ages in his main hand and Crom Faeyr in the other is badass.
How is Purifier with a shield? Sword and board Pallies are cool, too, I reckons.