Solo Machamp raids

If ressources are not a problem u obviously want lvl 40 mewtwos.

I was wondering the same thing. Would 5 DT/HU dragonites work?

People use mixed groups because resources are finite. As stated already, the best team is obviously Mewtwo. You don't even need 6, even at L30 only 4 will die with no dodging against the hardest moveset.

Optimal L30 no-Mewtwo team is probably 6 DT/H Dragonite as they can take any moveset with just a few successful dodges and have 10+ seconds on the clock.
4 ES/SA Lugias is the best bet for a complete no-dodge team made of the same mons but they will win with only a few seconds left on the clock and will time out if you fumble with the charge bar too many times or something.
6 Espeons is the easiest to acquire by far but will only be able to beat all movesets with perfect dodging. They are too squishy against DP or HS.

6 Espeon/Zam wouldn‘t survive thats why but have most DPS so a moxed teammakes sense.

6x Eggy would probably be the fastest if you don‘t use a mixed team and of course without Mewto