This is a team I built a while ago with laptops, coincidentally around Chansey. Scizor can help deal with pesky Mega Gengars and Tapu Bulus for Chansey, and in return Chansey can set rocks to help Scizor gets KOes with Bullet Punch. Tapu Fini does Tapu Fini things, importantly providing a resist to Fire- and Water-type attacks, and helping against Incineroar. Landorus-T has Intimidate and helps especially against Zygarde with HP Ice. Yache Berry is nice for living Ice attacks when you shouldn't, especially against Genesect, which you can Earth Power to put in range of +2 BP. Incineroar does the standard Intimidate/Fake Out/U-turn things, and is a valuable Fire-type. At this point there was a lack of speed control, I can't think why exactly we chose Mew over like Zapdos, but we did. Originally Mew was bulky transform, then at some point I seen Nido-Rus use this cool offensive set, and since the team had no Z-move decided to try it. People don't expect Mew to really attack, outside of Fake Out, other than maybe an Ice Beam or U-turn so the surprise factor was pretty strong. Being able to blow back stuff that don't expect it like Mega Gengar and Genesect, moreso if Tailwind is up, is really good. Though be wary that Mew's unique Z-move sets Psychic Terrain, which hinders Scizor.