Originally Posted by Drip

What worked for me, was an evened out speed for my own squads (430-ish speed, I still had that from the previous events) and a relatively fast helper (650-ish, so about 50% faster).
4 squads (including helper) in the bottom left camp, one squad in that other camp that has a pest (up top), empty on the camp that only yields some extra coins. Then pray that one of the two teams following the left path makes it through all three RNG nodes, while the helper (who turns right at the switchnode) should manage to take out the far right side boss in time.
It's like farming ?-7 at 10 more stamina cost until you get it right.

Well, I decided to pick it up again for the story. ¯\_(ツ)_/¯ Also, Camellia is <3

Thanks for the tip, Drip!