User blog comment:NicknameMy/Rework for Master Yi/@comment-201.47.204.53-20120204015759

Non-rework alpha strike has 20% of chance of nuking a minion for 400 damage at level 1, averaging 80 damage per minion hit. Using this logic:

Bonus damage to minions per level: 80/120/160/200/240

The average damage still the same, while removing the random factor. You could tweak the damage up and down, obviously, but don't overdo it (300 damage to every minion hit level 1? You want to instant clear any minion wave you land on to the rest of the game?).