Rogue · Assassination · tier 2 · from level 15

Ruthlessness

Rank 3/3

Gives your finishing moves a 60% chance to add a Combo Point to your target.

Doesn't change the damage or healing of any Rogue spell.

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.