Arrow antennas are well built, but I wouldn't do it.

Which Mirage amplifier? The 300 watt B-5030 G I'm familiar with does 300 watts with 50 watts drive.

25 watts drive would be less output, and probably OK.

Do you have a watt meter for 2 meters and a dummy load or antenna that can take 300 watts?

Measure what you actually are putting out.