First I am ignoring perform fot the moment.
I had debate in another thread and someone threw this idea out...in a more or less snarky matter but it actually clicked with me. I present it here for debate .
Instead of Spell craft skill being the end all and be all skill other than heal and repair for spell power create two additional skills. One for sorcerers/FvS and one for clerics/druids. The simple basics:
Spell craft as is based off on intelligence.
Channeling (name subject to change) based off of charisma.
Spirituality based off of wisdom.
Having one locks out the others ( to avoid the exploits I could see coming).
Discuss.