For any math-heads out there, we use a pretty common diminishing returns formula for Masteries & Mana Surge
SURGE CHANCE = MASTERY/(100+MASTERY)
So:
- Mastery 0 = 0% chance
- Mastery 20 = 17% chance
- Mastery 50 = 33% chance
- Mastery 100 = 50% chance
- Mastery 200 = 67% chance