What would you guys think of a system like this:
All ability score spells (and abilities) do not stack with one another, only override if higher.
So, for example, a cleric could cast empowered bull strength, aura of vitality, and divine power. The roll the cleric gets on his empowered bulls strength is a +7, this overrides both the +6 from the divine power, and the +4 the aura of vitality.
So at the end of it, the caster will only have the +7 from the bulls strength, he'll have the AB from the divine power, and +4 dex, +4 con from the Aura.
All of the 'animal name + ability score raise' spells are 'stabilized' in 3.5 fashion.
IE, Bulls Strength will provide an instant +4 bonus, rather than a roll, but under this system (it wouldn't override, or stack with anything else).
Discuss, be civil, and be excellent to one another!