Im sure that a well piloted eagle with codenames and nomad weps (and a few tizonas) can take down a BS quite fast. After all, the eagle is so maneuverable, that the BS would have trouble targeting it.
(If you find any mistake in my English, please let me know via a PM)
(Really, I speak terrible English, so please, tell me if I make mistakes. I'd like to improve it a bit )