Make like first 10-20% have a fumble chance as it is now. After that brief fumble period scale the damage/duration of spells without a fumble chance.
This way mages could actually go use their spell schools to level them up instead of sitting in town/safespot macroing the abilities. It would also speed up the leveling process since you'll be succeeding more often.
random example:
Dust Burst
Skill range: 70-100
for the first couple of points 70-75 you keep the fumble as is. At 75 skill you'll no longer fumble but the spell will do 10% damage. As you level up from 75-100 the damage will increase linearly until you reach 100% damage at 100 skill level.
This way mages could actually go use their spell schools to level them up instead of sitting in town/safespot macroing the abilities. It would also speed up the leveling process since you'll be succeeding more often.
random example:
Dust Burst
Skill range: 70-100
for the first couple of points 70-75 you keep the fumble as is. At 75 skill you'll no longer fumble but the spell will do 10% damage. As you level up from 75-100 the damage will increase linearly until you reach 100% damage at 100 skill level.