I obviously started with Staka. After reviewing its checks and counters, so many of them were stopped by a decent Bulu that he was next up on the list as a fantastic partner. He deals with bulky Waters and Water/Grounds that Staka can't puncture without a billion Beast Boosts. It also weakens EQs for Staka, which is neat.
Next up was Gliscor. It serves as a good Defogger, as well as a great bulky mon in general, but with recovery unlike Lando-T (and I just abhor using Lando-T). I'm a huge Gliscor fan too, so I wanted to use it. Resists Staka's weaknesses, and can murder Heatrans since this Staka is running Superpower not EQ. Starting off of that backbone, I added good ol' CelePex for some great defensive pivoting to the team. Those two plus Gliscor counter plenty of threats and aren't overly susceptible to hazards if I can't get a Defog off. They are prepared for a lot though, which was a shortcoming.
Now I had to think about how I wanted games to go. I could either fill this last slot with something offensive to co wallbreak/sweep with Staka, or go full defensive and let Staka be the cleaner end game. I chose the latter, primarily because up to this point my entire team was murdered by Mega-Medicham a few times. Once that thing got in, it was game over without some kind of miracle. Sableye serves as my Rock "setter", third Item remover, general wall/annoyer, and Medicham stop. It also stops Ferro, which is another annoyance to Staka.
The idea is to whittle down threats bit by bit, and then let Staka come in end game and Trick Room once for a full sweep. Bulu weakens its counters as well as taking a few KOs itself. The rest of the team just weakens and annoys until Assembly can destroy.