Solomoriah wrote: I agree, there should be some way to promote higher INT among magic-users, but I'm not sure what it is.
The bonus to saves vs. Spells is fine, but it's not something that a Magic-User is going to benefit from on a day-by-day basis (in the same way, for example, that a Fighter benefits from "to-hit" and damage bonuses for high strength). A couple of other ideas for promoting/rewarding high INT for MUs that occurred to me over the weekend:
1. Apply the INT bonus to the number of starting spells in a Magic-User's spell book. So an INT 18 MU would start with 4 starting spells (+ Read Magic) in their book. This wouldn't mean that they could cast 4 spells per day. Just that they have learnt additional spells (at Wizard School, or wherever).
2. Allow a Magic-User to apply the INT bonus to the number of spells of each level that they may memorise each day (but not cast - that would remain the same as it is currently, i.e. the table on page 8 of the rule book). So a high INT would NOT increase the spell-casting capacity of a Magic-User, but it would provide them with more spell-casting options.
Neither, I think, would be game-breaking, but would provide a tangible day-to-day benefit to the MU of having a high INT.