Kuif here it is (where it says PSU in INT is only for range and speedcasting)
Psi Use (PSU): Important: Complete Re-Write! Psi Use has two effects. Both are only important to people who use Psi weapons (spells). But then, eventually, that's almost everybody. PSU increases the speed, and slightly increases the range, of psi weapons. It also increases the amount of Psi Energy you have available to fuel them - but not by much. Psi Power (PPW) increases it 3 times as much as PSU does. This is on purpose, see the note about "Hybrid Monks" under PSI.
Taken from rewritten skills guide in Player help Player forum.
Also:
http://neocron.jafc.de/showthread.php?s=&threadid=88003
But tbh, i would not lom Schan (because this setup is more for a tradeskilling ppu), i think she's one of the best ppu's
Also, feedback (tips) appreciated of course
Oh, and if you need to store TP's and stuff, my PE and Monk do have an empty apartment. Got some room left there