I made this many moons ago, when this dlc dropped everyone wanted to use regieleki, however people quickly realized it isn’t great in a 6v6 format. Honestly it took everyone saying it was trash for me to want to build with it, so I decided to build around it with Koko, and use rising voltage to basically delete slots. I think some people have since then expanded and gone full hail + rising voltage, but I think AV kyu-b is plenty for dealing with ground/grass types.
The team is built around pivoting + spamming icy wind & electroweb in order to maintain position and pressure so that stuff like Urshifu can roll through any opponents that Regieleki can’t beat. Tsareena is necessary to block fake out as well as being one of the best taunt users. The team has double taunt because of the opponent gets up any sort of speed control, you’re in trouble. Incin rounds out the team to provide some fake out + pivoting. The team in practice works out pretty well, I’ve brought it a few times to tours:
https://replay.pokemonshowdown.com/gen8doublesou-1429148458-exhflmxej87tskehlt07pg77toduo05pw