[PhoenixPaw]

Enchanter effective in a Banestorm Campaign?

Beside the months or years of down-time to make anything (unless it's something very simple like Penetrating Blade on an arrow, which is doable through Q&D-enchanting) sure. Can be very useful for the group.

I would probably rather go for (in order of preference):
1- Healing (can reduce recovery time after a fight from a week to a couple of hours)
2- Meta (esp. Ward, Counter-spell & Remove Curse)
3- Mind Control (Daze, Sleep, False Memory, Ecstasy, Hallucination, Enslave ... lots of goodies there to pick)
4- Light and Darkness (all I say is: "continual light"-rocks & invisibility)
5- Body Control (Might, Retch, Spasm to name a few.)