Talk:Proton Rockets/@comment-77.3.75.128-20140721200623/@comment-63.252.93.250-20140731173505

Homing Missiles is the perfect example of this difference. The FAQ clearly states:

"The attacker must have a target lock on the defender to use Homing Missiles, but the target lock is not spent in order to perform the attack."

The same ruling will be the case for Proton Rockets. You must choose the focus action to use the weapon, but you do not spend the focus token to perform the attack. That way, the focus token is still available to modify the dice results.