the problem is, you cannot even get your first spell out
you see, the philoserphy here is, you are lvl 50, and you already have advantages over me, so i wouldnt wait there and let you cast time stop.
i will put on a protection from magic scroll on YOU the first instance i realise you are using time stop. (it is very easy to tell, just look at the color, and the protections you are wearing right now.)
1) in order to cast time stop, you HAVE to have protection from magical weapon on. EVERYTHING else can be penanrate through by crom faeyr +5
2) the color of time stop is green.
so i just put a scroll on you, and you are muted forever (go check it yourself and see what the scroll does)
also, a barbarian can easily get 60% magic resistance without cheating
a fighter can always attack during each round while mages have to either run or hide
a barbarian can use bow to chase mages, also barbs have speed bonus
you can use invisible such as staff of magis, but scroll of magic protection dispels it. you still end up dead