Assuming a world where starships don't use missiles and bullets in combat much. They only carry those as a final strike or for convenience. Their arsenal is almost entirely composed of electricity-based weaponry and tools: Arc generators to scar opponent ships with lightning bolts, field generators to deflect and reallocate incoming discharges and objects, voltage adjustment, gas emitters to produce plasma blobs, the works.
This could invalidate certain tactics - small craft might be too easy to destroy because once they enter the range of a large cruiser, they don't even have to be targeted - they're just struck by a discharge due to voltage difference. They can try to match surface potential, but the cruiser is already varying its own based on some unpredictable sequence, making it unfeasible. Missiles suffer the same fate, so they're out of the question.
Assuming power isn't hard to carry, how would this arsenal further change known tactics that are used in naval and air battles? Could it possibly invalidate certain kinds of corps and produce new ones?
Specifics on the technology available:
- Gas emitters to create a medium for discharges and possibly shielding
- Field generators that produce radial EM fields
- Voltage adjustments to modulate surface voltages on plating and in the fields and plasma
- Heavy disposable plating, with insulation, to protect from enemy attacks and protect the inside from overheating of the plating itself
Arc generators to allow arcing through the generated medium
Power striking the plating and shields can be absorbed if it isn't directly disruptive; enemy weapons that don't immediately cause damage have the power redirected into batteries.
edit - sorry about these changes, it's an old idea and I don't have my notes at hand