What's the best way to find a dead cylinder?

We're it mine, I'd have a friend jump in, fire it up, put it in low, brakes hard on. - give it a buncha gas, and load it up, heavily.
It should be missing badly, by your description.
Start pulling plug wires, it should be very evident which 1 or 2 cyls are not working.
Could be head gskt affecting 2 cyls.
Plugs should tell something, one should be "different" .
Tight valves is a good bet.
Did you try slowly closing the choke while hot and running to see what it does ?
Did we ever get a video ? Get a video of it while loaded-up !
Good luck