Gems, fatigue and increasing magic levels

[mivayan]

llamabeast said:
Going above 200 fatigue is indeed quickly fatal, _but_ casting a single spell will never take a mage above 200 fatigue (I only realised this recently).

I suspect that it's a max of 200 per spell. I know that if you have 0 fatigue before casting a 300 fatigue spell you'll be at 200 and unhurt. But if you are at 50 fatigue before, I think that you can only cast spells that cost 150 or less after modifications. Not 100% sure on this though.