My take:
Cleric 3/Wizard 3/Mystic Theurge 4
Domains: Good, War
Uh, how about Str 8, Dex 14, Con 12, Int 15, Wis 15, Cha 10. Naturally, the next two advances should go into Int and Wis.
Feats: W Focus (longsword) (B), Practiced Spellcaster (Cleric), Practiced Spellcaster (Wizard), Spell Penetration, Spell Focus (enchantment)
General thoughts: The Good domain provides some unique options, while War is better at higher levels, and grants a longsword focus you can use in conjunction with divine power. At effective CL 12 vs. SR, you can rain down a heavy hail of hold person, hideous laughter, and the like. Vital gear would be a Int and Wis combination booster, rod of extend metamagic, ring of force shield, bracers of armor, +1 flaming longsword.
Room for future growth: Quicken Spell would be a good 12th level feat, then Greater Spell Focus at 15th. Considering your wealth of low level spells, more metamagic rods and ring of wizardy IV would be great acquisitions.
If you like these ideas, maybe we can help out with a definitive equipment list.