Non Attribute Dependent Caster

[Eldariel]

In addition to Taint, Artificer is also a good option; while infusions require some Int, mostly you just need enough UMD to make whatever you want and then use it. It allows you to access all the spells in the game relatively easily, particularly if you go Unbound Scroll. DocRoc did some describing of how to make it work more or less for free (Pro Tip: Ghost Writing is basically free spells).