Currently reworking entire character with Incantatrix
Halruuan Elder is still a good idea too, as it gives Circle Magic. Recruit that Wizard's followers (and the Wizard too, if possible) and charge that puppy up! Versatile Spellcaster can get in a level early to Incantatrix, soooo :
Sorcerer 5/Incantatrix 1-10/Halruuan Elder 5/Incantatrix 11-16Gets epic Incantatrix goodies, circle magic, two instances of adroit casting, and two signature spells. Pick up True Believer and a Tome of Ancient Lore, and laugh at the Wizard because now you've got the same versatility as him, only with more slots. You can pick up more higher level slots with VS, and that can be augmented by the lower level Rings of Wizardry. Standout metamagic feats are Extend Spell, Sculpt Spell, Persistent Spell, Empower Spell, Fell Drain, Chain Spell, Reach Spell, and maybe Ocular Spell if you
really wanna persist everything. Remember, even if it isn't a target at casting for persist, Incantatrix' Metamagic Effect only stipulates "ongoing magical effect." Meaning once it's cast, it's fair game. And you can add more than persist to it...Persistent Spell and then Extend Spell x 5 on a
forcecage, then invite the town to poke at the BSF in lock-up
You might ask, "Why Fell Drain and Empower Spell?" Well, at this level, it's trivial to change your feats. You can use pocket lint to pay for a permanent tattoo of PsiRef. Ever seen what happens when you hit someone with a twinned fell drain magic missle? Or for that matter a trio of fell drain magic missles coming from a spell matrix? That's a LOT of debuff. If you have Sanctum Spell, you can throw out three Arcane Fusions from a Spell Matrix (is the 9th level one Spell Trigger?), each packing a Fell Drain Magic Missle spell, for a total of 6 instances, all autohitting with 5 missles for a total of 30 negative levels with no save. Now we see why I advocate Halruuan Elder...caster level of 40 + your CL bonus items + Create Magic Tattoo means SR won't be a problem. If your wizard buddy gets too uppity, kindly remind him that any time he forgets his shield spell, he can be just as fucked (or don't, and spring it on him if he ever goes rogue on you). Just a few ideas off the top of my head. Also, if you go the debuff missle route, remember...you both are fully capable of SoD/SoL/SoS spells...and chances are they will Die/Lose/Suck when they have a -10 to -30 to the roll.
