Rogue · Subtlety · tier 2 · from level 15
Improved Ambush
+212 Ambush
3/3 · level 60 · per cast
Improved Ambush
Rank 3/3
Increases the critical strike chance of your Ambush ability by 45%.
Averages, counting crits and misses, for a level 60 Rogue with a typical weapon and no other gear or buffs, against a target your level. Worked out from the game's own data, the same way as the Foresight addon.