-Intelligence is too powerful. Geomancy should scale off of Strength and Aerothurge should scale off of Dex to balance the stats out.
Oh god no.
This would just be
way too good for warrior builds. Way, way too good. Especially considering the Zombie and Bully talent's synergy w/poison spells and of course Midnight Oil. And you get summons on your warrior, and Bless, and another knockdown that does..poison field. Wow.
Actually it'd be really strong for scoundrel/marksman as well of course, but I'm not sure extra invisibility methods are needed there considering sneak 5 is all they need most of the time.
I would pretty much stop playing pure mage if this change happened, and roll face with two LW/GC Zombie Warriors w/Geo.