I was looking specifically at the spell durations, first. For magic-users, I had come up with:
Reasons in favor:
- Many combat spells are already 2d6 turns.
- Since many low-level non-combat spells are 6 turns, replacing the duration with an average roll of 7 won't be too bad.
- We give physical effects a level-based bonus, just so players can predict how long Fly might last.
Is it really so wrong?