During testing, a couple of things have come up.

1) I had long ago decided to add another battlemage spell which I forgot about until a battlemage tested out the class:
[*] Offhand Channeling - Can use a staff as a secondary weapon instead of as a primary and still get the full staff channeling bonuses.

2) I looked at warlocks and felt that the class was pitiful. It has some very interesting and useful things, but it just wasn't enough. I decided to add two more abilities to them (one melee based, the other not).
[*] Majestic Accuracy - If critical strike fails to land, for a small mana cost this attempts to hit critical strike anyways (10% chance of working). It is passive.
[*] To Be Determined - Ideas are still percolating, and if anyone has a good idea, let me know.

For building, I'm assuming that mobs will be able to have most of these skills/spells as mprogs? I was thinking that would be really cool since the number of nonsoloable mobs by adepts is less than a dozen, and this would help make more challenging mobs.

For Hellfire, that is going to be quite weak for characters not using staffs. It does get an average of twice as many enflames off in the time, though. (3 average vs 1.5 if you just cast enflame normally)