Definitely crossed my mind, but who's to say whether Incantatrix Wizard is better or worse than Incantatrix Wu Jen (using the famous Team Solars trick to buff the rest of the party instead of having the Wizard spell list)?
Actually, more to the point, where is the cheesiness ceiling in this "power gaming" exercise? Judging by the tone of the OP, Pun-Pun obviously isn't allowed. But Incantatrix is still far too overpowered for many DMs. If Incantatrix is allowed, what else (even more powerful) is allowed? Dweomerkeeper? Cancer Mage (abuse)? Illithid Savant? Tainted Scholar? Or even ...
... this monstrosity?If we are talking about high-end powergaming, then either the Druid goes for Planar Shephard or is replaced by aPsionSpell-to-Power Erudite for all the action economy and time shenanigans.