I've looked through a lot of threads on spells but I didn't see any suggestions like this, unless you count web + spider spawn, but thats so easy to figure out becuase enemy mages cast it on you.
One other question, is there a mod that adds scrpit to mages so that they cast like a human mage would, not cheese like 4 Project Images summoning an army, but timestop then Improved Alacrity and then dumping their spell books on you, or even some lvl 10 spells, Imprisonment, Spellstrike and Timestop seem to be the only lvl 9 spells I see and it just doesnt seem fair to them...
ps I've done everything in ToB up to killing balthazar, currently killing the massive ravager, so I don't know what sort of spells are used past this...