Your ACU is supposed to soak damage for your tanks to at least some degree. Go for range before speed if you can only get one and then kite away. If your opp has gun though you should be able to get both not too long after they get their gun if things are fairly equal.
Flares definitely don't need a buff, they're already the strongest labs for the reason stated somewhere in this thread iirc, basically they are to try to augment the auroras weaknesses a bit at the aeon t1 stage.
EotS is neither a navy nor a land map, it's primarily an air control map. Land and navy are both secondary. Get air control, bomb early expanding engineers, and then with air control drop the corners and go t2 air. Then press the advantage with gunship raiding and or t2 bombers, but gunships are more typical.