Compared to having thirty Prince Mechas charge at them, of course, it's more effective to use nuclear weapons on them, after the Federation employs its nuclear arsenal.
"Communication is about to be lost, let me say a few words."
After the Ace mecha warriors finished speaking, Han Li spoke up: "After we launch the nuclear strike, the Empire might indeed retaliate with a nuclear strike. There are two possibilities: the first, the Prince Mecha squad will distance themselves further from us to avoid damage from the nuclear strike, and then attack us again. The second, they don't want to give us a chance to retreat; they might opt to engage in close combat and directly use nuclear weapons.