So just a simple question here and the validity of stacking Steel Dictate ability with other damage boosting vigilante talents such as Fist of the Avenger, and Lethal Grace.
Steel Dictate:
Steel Dictate (Ex): A Chu Ye enforcer gains Improved Unarmed Strike as a bonus feat, and when he hits with his unarmed strike, he gains a bonus on damage rolls equal to half his vigilante level (minimum +1, maximum of +5).
This replaces the social talent gained at 1st level.
Fist of the Avenger:
Fist of the Avenger (Ex): The vigilante gains Improved Unarmed Strike as a bonus feat, if he doesn’t have this feat already. In addition, whenever he successfully attacks with his fist or a gauntlet, he gains a bonus on damage rolls equal to half his vigilante level (minimum +1, maximum of +5). Only an avenger vigilante can select this talent.
Lethal Grace:
Lethal Grace (Ex): The vigilante combines strength and speed into incredibly deadly attacks. He gains Weapon Finesse as a bonus feat, and if he already has the Weapon Finesse feat, he can immediately swap it for another feat for which he qualified at the level he chose Weapon Finesse. When using Weapon Finesse to make a melee attack using his Dexterity bonus on attack rolls and his Strength bonus on damage rolls, he also adds half his vigilante level on damage rolls. This bonus damage is not reduced or increased if the vigilante is wielding a weapon two-handed or in an off-hand.
Can it stack with either and/or both of these options? Lethal Grace seems to be able to, but as FotA has almost identical phrasing, it's a concern that I personally have on it (despite receiving the all clear from my GM [home game]).
I can't say whether it's intended, but it certainly looks like it would stack with both.