Decided to go with Entei + Sylveon since Sylveon greatly appreciates Entei’s ability to spread burns around to half their team. Entei makes for a great scarf user due to inner focus + Sacred Fire. There’s only like 4 mons (Fini/Incin/Heatran/Volcanion) that can comfortably switch in on a sacred fire, the rest don’t want to risk a burn. Rillaboom is added to change away misty terrain and beat Tapu fini, as that’s the main counter to Entei. It’s also great support for leftovers Sylveon. I wanted a second set up sweeper that would compliment Sylveon and take advantage of Entei, and that’s where Zygarde comes in. Zygard beats the steel/Poison/Fire types Sylveon can’t, and Entei helps check many of Zygardes counters.
Pretty much every team is weak to one of Sylveon or Zygarde, so from there I rounded out the team with a TR user in Cress. I chose Cress since I needed a decent lando switchin, as well as a setter that was good into Urshifu. Lastly I added coaching Scrafty. Sylveon appreciates the intimidate support, and both my set up sweepers love coaching. I also needed something that was good into P2, and Scrafty checked all the boxes.
The team is pretty solid, I’ve won a few room tours and solid ladder matches with it. Here’s a replay:
https://replay.pokemonshowdown.com/gen8doublesou-1589237200-fqon9hpswnvx10mtqmx9cj02hctpvh1pw