Do not know if it will possible at this time, but someone could change the maximum limit of MP to 100 instead of 999?
You could just calculate Growths, Gear, etc. yourself to make sure maximum MP can never surpass 100, y'know...
1 Mp each level, you start with 1 Mp
XD
You got it wrong, if I want it at level 50 the MP doesn't grow more, what I do?