Successful Lapras duo with weather boosted Machamps & Hariyamas
Only posting this because I haven't seen this one discussed much, but it was pretty easy. Cloudy weather, so fighting types were boosted. Both teams had four C/DP Machamps and two C/DP Hariyamas. Lapras boss had FB/HP. Won with about 25-30 seconds left, with the last Hari on both teams having just entered the battle and being near full health when the Lapras boss fainted. No dodging.
Seriously, people, if you don't have a solid team of C/DP Machamps, make that a priority. It's arguably the most useful mon in the game right now, for both raids and gym battling. C/DP Hariyamas will fill in nicely until you get enough Machamps. And don't try to fool yourself into thinking other movesets are almost as good, because they are not even close.
edit: OK, regarding movesets, KC/DP is close, if you happen to have CTM'd your legacy KC Machamp and were fortunate enough to score DP (I gave up after seven failed CTM attempts).