This is a tough one. We have time zones, different power levels, and different qcx bands.
Lets see 3 natural qcx approx levels are common. 4 watts, 25 watts on 13.8 volts and 50 watts on 24 volts. All plus or minus about 1 dB.
My only working qcx ops on 80m. Not confident there is much qcx contest activity on 80m.
In spite of having thousands of qcx on the planet, its a bit exclusive. Maybe expand by encouraging homebrew transmitters.