Ablative question

[Lord Mhoram]

If multiple attacks hit an ablative defense at the same time, does it drop the activation one step total, or once for each attack that exceeded the defense.

The concrete example that brought this up; trying to model from the X-wing books the action of the squad of snubfighters firing thier missiles, having 16 or 20 (co-ordinated usually) hit the ablative force field of a capital ship and dropping the shield completely.

[Steve Long]

Each hit that would reduce the Ablative Defense according to the Ablative rules at use in the campaign reduces it. Thus, five hits could potentially reduce the Activation Roll five steps, even if they all occur on the same DEX in the same Phase.