I train magic level since ML 90, but only in Double Skill Events...
After ML 101, I didn't see much difference. I'm ML 108 now...
Avalanches +- 500
Sio ~600-2000
SD ~700-1000
With full ML set, my magic level goes to 140.
Avalanche +- 700
Sio ~700-2400 (all time-high)
SD ~800-1200 (~1500 if critical hit)
Of course, it depends what kind of creature you're hunting...