Hmmm... Trying to combine the two idea, feel free to comment on possible changes.

Shinobi's Precision: Vex releases the restrictions on RETINA; who in turn allows the suit to strike harder than originally designed with devastating. This causes the suit to strike with even more power/momentum, that ignores physical protection and applies the Maimed effect- -10% ATK/-10% DEF. This strike can only be used while RETINA is active.