balance is a rouge skill i have 4 capped casters and i play only 1 why? because the first one is wizard...... 1350 mana without shroud / archmagi hurts
second one 22 cha hurts...
third one -3 balance hurts..
fourth one i got everything right on XD 12 int and plus 2 tome get umd balance concetration youll be smiling when they comet fall you and you arnt killed instantly
also tumble helps when fighting beholders if you use docent of difiance you will want nat tumble of over 1
no rouge levels are needed im just saying you gotta get balance and concentration
just my two cents