Mind Mage is... interesting, having looked over it recently.
Main problem is that it was created for 3.0 psionics, which isn't particularly compatible with 3.5. Class feature referencing Heighten Power makes the 3.0 clear.
DR313 is Mind Mage. DR314 starts the 3.5 XPH preview material. 3.5 generally also did away with most class features improving any sort of DC, and ML... to an extent. Archmage changes, etc.
The designer of the class & the psi-spell feats actually seemed to understand the pains of (non-cheesed) theurges. If you consider the as-intended build, it starts off weak, but the CL/ML ends up above 20 in the end, and spell DCs get boosted pretty nicely, despite losing access to the highest levels of spells/powers. Psi-spell feats make an attempt to make a few disciplines effective while you advance toward Twin Wells.
Psiotheurgist from DR349, is for combining the school CL/ML, and is just on crack. Published well after Cerebremancer, and I believe also after Practiced X.
Get's out of hand quickly...
http://brilliantgameologists.com/boards/index.php?topic=6654.0