Could make it more like how Mirage Archer works, then.
You could, but at that point it's become something very different to triggering the attack - the attack isn't triggered (it's performed by it's user by playing the animation, which is just attacking), and it isn't you doing or triggering it - it's a mirage or similar totem-style object, which has all kinds of mechanical consequences. We could do that, but it would be fundamentally different enough from triggering that we couldn't call it that.