First I was waiting for 3 extra days for his friendship request (profile on bc rank is unverified). Then he forgot what we was trading for, and after a day he said, that he wrote to me and I wasn't answering so he use mobile for evo. I don't really get those messages, and deal is a deal. So I don't recommend to trade with him.
Watch Chanco21's water team vs. PHKES5's water team.
Chanco21 has a 1251 PvP rating and his team features 2 invincible, 1 counter, 1 shield, and 1 swap for actives.
This video explains how to properly use the Swap ability on Battle Camp. It also describes a method you can use to become better at it. All mechanics and calculations behind Battle Camp gem-matching are explained.
Backed out of trade after 24h.