Rogue · Combat · tier 1 · from level 10
Improved Sinister Strike
5 less energy
2/2 · Sinister Strike
Improved Sinister Strike
Rank 2/2
Reduces the Energy cost of your Sinister Strike ability by 5.
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.