Lol I can do most spells as a Redgaurd that is rigged for fighting. Of course the mana pool is important, but something you should consider is enchanting your own items, two in fact. A ring of regeneration and mp regeneration. Not hard to do if you get the Knights of the Nine exp. pack and use frostcrag spire but if you dont get the exp. pack its a bitch and a time eater to get to a high enough level in the mages guild.

Anyways at like level 15 or 16 you can get a couple rings that are always restoring 7 or 8 HP and MP. The real problem is getting a big soul. This is the part where being a goody two shoes sucks Lenny. Later you will learn how to make Black Soul Gems. Capture an innocent soul from a powerful person anywhere and you should get enough power to make these rings.

Mmmmmm with evil comes power...mmmmm.