How to Solo Machamp Better

Next time start with Alakazam and keep your Lugia as 6th slot. You want to start with Alakazam because it is so fragile and want to get hit as less as possible by raid boss his charge moves.

how far into the charizard did you get?

This is just my opinion, i could be wrong as ive not experimented much with fire types vs Machamp (and also depends what you have access to)

But get rid of charizard, throw some espeons into the mix. Maybe keep Lugia as your last slot...but there are higher dps options if dmg is what you lack.

I would say maybe add two espeons, with Future sight preferably, defintely add one atleast...

If the Dnite doesnt have hurricane, maybe swap out also.

And finally try experimenting with Gengar, it could work for you, takes reduced dmg, is very dodgable with shadow claw and does decent dmg

With that team I would line them up in this order...
Alakazam
Alakazam
DNite
Moltres
Charizard
Lugia

The d'nite could go in 3rd or 5th...but I would place it in 3rd.