12th, huh? In that case, NEW PLAN: He goes to 3rd as a wizard, then gets religion, sees the error of his arcane ways and becomes a cleric for three levels. Now he's Wizard3 and Cleric3 and can cast 2nd level arcane and 2nd level divine spells. This qualifies him to become a GEOMANCER. By the time he reaches CL12, he is wizard 3, cleric 3, Geomancer 6, which means that he can cast the wizard spells that he knows while wearing armor (he just needs for his Geomancer PrC level to be higher than the spell level of the arcane spell. There's no way he's going to be casting a 6th level wizard spell! (Although his CL does increase as his Geomancer level increases, either in his arcane class or in his divine class, but not both for the same level. So, for example, his arcane cl could be 2+2=4, while his divine caster level would be 2+4=6. hmmm.