If you let them win at 109 g or k, you are doing something wrong.
Moreover, you can add the g55 series; at the moment, Fiat is literally the best 4-5 brigade fighter.
10 rockets, even if small, increase the overall damage you can do in one run, dump the rockets on enemy infantry and then hunt a tank with the 250kg bombs.
The M-13 rockets are HE and will sometimes struggle with heavier tanks, you can use the 4 50 kg bombs to finish it off.
There is no reason why extra ordnance would be bad, especially when its so light.