Sirene Primer+Constant Effects+Creative_Strike

At 2nd level, whenever a mountebank makes a successful attack with a light, finessable, or ranged weapon, she may choose not to add her Strength modifier (or any other ability modifier she would add) to the damage roll. If she does, she gains a circumstance bonus on that damage roll equal to her casting ability modifier; this bonus cannot exceed her class level. If any effect would prevent the mountebank from adding her Strength modifier to the damage roll (or if she would normally be unable to, such as with crossbows), she cannot use this ability.