So, is Navy the omni class then?
I would assume with a hacking character you can get all those extra cyber modules. Or is the amount of cyber modules given the same for each class?
No matter what route you go you should invest in hacking. Otherwise you will spend your whole life wondering what kind of treasure awaited you in that locked crate. It will also get you through certain doors and forcefields. As for hacking turrets and cameras, I have played through the game four or five times over the years and this is the first I'm hearing of it. Like seriously I didn't know you could do that. It's easier to just shoot everything. Conserve bullet ammo until you max out Standard Weaps and grab that assault rifle, baby. Especially invest a few modules into Psi as early as possible for the Psi-Pull power and the basic Cryoshot (or whatever it's called). The game is full of hidden supplies that are only accessible with Psi-Pull, and the standard Psi-blast is a great fallback weapon if you ever run out of shells or bullets. With standard weapons you will be swimming in psi-hypos by the end of the game.
There is a huuuuuuge surplus of ammo once you get aboard the Rickenbacker followed by a huuuuuuge drop off once you get to... well, you'll see. You could always just be a weirdo and stick with the wrench, which would be odd considering all the military grade munitions lying around everywhere.