Mystic Theurge [3.5]

[Assassin89]

In my D&D sessions, I play a 3rd level Cleric with the healing and good domains. I plan to reach 14th level in return to elemental evil and multiclass to wizard. What I am asking is how I should set up my wizard levels, because I already have the necessary ranks in knowledge (religion) and knowledge (arcana). In the case of barred schools, I do not want the simple take divination and then take spell focus(school I would want to take).

Edit: I forgot to mention the feats my character has:
Sacred Boost (from complete divine)
Augment Healing (from complete divine)