Originally Posted by Eldan
Did you check that with my take on the Concentration skill? We don't want different DCs here, after all.
The spellcasting check modifier seemed to me like an easy way to integrate two ideas. Also a way to eliminate some of the "skill tax" normally represented by Concentration (especially given all the autohypnosis abilities we're giving it, making it less suited for casters).
Also, the by-the-book Concentration DCs (which are mostly what you used) are pathetically low.