Originally Posted by
Ellyll
Perhaps a more concise explanation of why you do not want to do this would be this:
You would have a L 10 wiz, and a L 10 sorc. The highest level spell you would be able to cast would be the same as a level 10 wiz could cast. You would, in actuality, be a L 10 caster, inside a L 20 body. The do not stack.
If you really want to go all nuke you should probably check out others sorc builds. I do not think you would have to swap spells very often if nuking is all you want.