[Fyron]

1) I am not sure what you mean. The smallest possible damage value is 1. If you want to know what weapon does the lowest amount of damage in SE4, look it up. It is probably a troop or fighter weapon (or both, as most are shared).

2) No. The amounts of cables and plating needed are determined by the tonnage of the component. This would not work as a hull ability, because hulls have no tonnage value (hit points). You might be able to make the generator abilities work from a ship hull, but I am not sure if that will work or not. The best way to find out is to test it.