[Captain Kwok]

A point I should make before Fyron stops by is that the reason for dropping internals to less than 1HP/kT structure, is to make ships very fragile once they have no armor or shields - which is consistent with what we see on Trek. It also helps to encourages better "leakiness" by increasing the chance that damage that bypasses armor will be sufficient enough to take out an internal rather than just apply partial damage.

On on the other hand, dropping it too low has the potential for multiple internals to be destroyed before a reasonable amount of the armor has been taken out.