Name suggestion:
Blade-song's Harmony
Harmonizing Blade
Harmony to the Melody of Blades (Exalted-ish)
Replicate attack could get cheesy with Shock-Trooper one round from behind cover for any important enemies (most cheesily against a rat from the proverbial "bag of rats") and then Power-Attack the next round.
For Cross-Referencing/Prior Art (I hope I am using that term correctly) purposes: The relationship to Master of Nine has been noted, and the concept of using multiple strikes (in my case as part of a full-attack) is present in my True Master of Nine.