True, imagine such a huge monster being killed by 10-20 flashs lol, its like saying you got a big destroyer, and 20 men are firing their rifles(let's say ak47), and boom the ship asplodes ^^ yeah right.
However some Units are imba, the nuclear submarine, lol do you know how FAST this thing is? faster than a scout plane, at least twice the speed of it. I guess it could even outrun torpedos

, so this needs to be nerfed for sure .
However some people are to strict about balance, best thing for them would be 5 tanks per tech level, all the same, just different models and names. there you go balanced 100%, only tactic wins!
I think resources should be tweaked more, the only thing why Big Bad Boys are overpowered is because you can build them TOO fast with enough resources. The Monkeyloard should cost something along 20million metal, 50million energy and a build time of 20-30 minutes if there's no assistance of building vehicles...