ooh... F. Gottwald's sanctuary/blade barrier is truly nasty. ouch. too bad it doesn't work on dragons. In ToB, you get Globe of Blades, which is a much improved Blade Barrier, and Aura of Flaming Death, which is a combination of Fireshield:Red, Resist Fire, and Globe of Blades. i can see someone with all three of those walking up to Jonny or some big lich and giving him a little slicy-burny action.
you should get ToB. it's quite fun, and has a much more satisfying ending than SoA. Also, everyone should go to
Baldurdash if they haven't already. It is greatly helpful, and has some cool Kangaxx/solo mage stuff too. experienced players should look at
TeamBG also, since it allows you to make your own bugfixes, and put those (hopefully not too-) powerful weapons and items Bioware never thought of into the game.