A lot of your names seem to suggest that you think it will allow someone who has been ambushed to act in the surprise round, hence names like reprisal, ever ready, etc. That's not the benefit he described, the OP described being able to use a full round's worth of actions rather than just the normal surprise round allowance. Thus I'd suggest something that implies a mastery of springing ambushes:
Sudden Assault
You are so practised at striking at unsuspecting enemies you are able to make full use of their ill-preparedness.
Strike while the Iron is Hot
You know how to maximise your starting advantage in battle.
Startling Ambush
When you spring a trap you do it with such devestating speed that the enemy cannot react.
Boo!
When you launch an attack your tactics and speed put them immediately at a disadvantage.
Hope these help, peace out