So far I haven't really changed anything, and I've got really high rank for right now. Here is my opinion-
Dropping 1 4k bomb on something to get your 'hit % up' is kind of a waste of time. I drop all the bomb in one big salvo, and try to destroy the whole target I'm dropping on. Sure, my hit percentage isn't as good as some peoples, but you can make that up in other categories.
De-acking in fighter mode. Good thing. Yea, it costs you 'accuracy'... but if you get to vulch people then your accuracy goes right back up higher anyway. People that refuse to deack in fighter mode arent doing it because it'll drop their accuracy, they are scared of dying to the ack, and would like YOU to die so they don't have any competition in the vulch.
So far I haven't shot at any of my own buildings, but my attack rank is still pretty good. I don't think you get credit for 'damage' if you shoot your own buildings, so if you take off to sit next to one of your hangars and shoot it, you are getting one category up (hit %) at the expense of all the other categories. Why not actually take off, and go shoot enemy buildings? Then you could get all the categories up.