[Suicide Junkie]

Strategies will help that last one a lot.

Set the firing options to 10% damage to targets, and do not target nearest. Instead, pick ones that are unlikely to target the same ship twice in a row... Has weapons, fastest, and least damaged are good ones. Farthest works too, since it will target the things that your PT boats will definitely not be shooting at.

You definitely don't want your whole fleet firing on the same ship.