Uh,the "Flail of Ages" is better than the Carsomyr.
I had a warrior using two of them. (Loaded him into a new game,because the storyline bugged out.)
In any case,you could make a cleric and solo the entire game with summoning spells.
Edit:Stat wise,the Flail isnt better,but having less restrictions makes a huge difference.
Plus having 2 makes it even better
