hong said:
Repost for the tardy:
I can't think of any in-game niche that this PrC fills. The only reason it even exists, as far as I can tell, is to patch up a hole in the multiclassing rules.
I think you are working under the faulty premise that a mechanical aspect of the game neccessarily has to be articulated in-game, which is not true. One of the founding tenants of Prcs was that they make concepts that are not viable viable. With 3.5, the developers are being a bit more thorough this time out in that approach, thus the spellsword, the Mystic, etc...