Hopefully, this thread is a better one.
Setting: Open ground
Win Requirements: Usual
Please let me know if this is STILL unfair, but I hope it is fair.
Mega level digimon are no fair match for HST level characters. You'd get better results putting ultimates instead of Mega levels.
Machinedramon tagged WarGreymon who is easily in the hypersonic+ range. Plus he wasn't even scratched by ultimate levels(an average ultimate is mountain level) going against him and could nuke all of them.