In ToB you'll see that mages are easy play and the power of a true sorcerer, usually ANY mage can be eradicated by this combination spellstrike/flamearrows/horrid wiltings ! But in shadows of Amn you can easy whack the crap outta Tolgeris with Casomyr, it'll probably whack its way outta the protections, yes breach and pierce magic can be used but if you havent got them better stay outta of his LOS until his protections run out, when they do you'll hear the sound trigger
Hope that helps
