Here is a little about the team:
Smeargle does what smeargle has always done. Set up a spore and hazards. Primarily, sticky web. I almost always lead smeargle unless I see a Tapu Fini or Mandabuzz. Guaranteed at least a layer of spikes since it holds Focus Sash.

I decided to go with another Sash with mamoswine also as my rocker and after people see sash smeargle they don't expect sash mamo. Mamo survives 1 scald or surf from Fini, so I usually spam Rocks until Fini kills mamo

Mega Pinsir is a very standard set and doing a clean 70%~ to Tapu Fini.

Mimikyu is almost a must for prebank teams, unboosted Shadow Claw doing 80-90% to Lele. If you can get sticky webs up, +2 Mimikyu can 1-2HKO everything bar celesteela

One of the main sweepers of the team, Battle Bond Greninja. I opted for the Life Ord variant because being able to switch moves in this tier is absolutely great compared to choice items. Especially after you get the Bond off.

And lastly, Xurkitree. I went with the Electrium Z for two reasons, 1) Tapu Fini lives an Unboosted Discharge unless you ZMove it. I just dies. And 2) Most Tapu KoKo and unresisted mons will die from a +1 Z-Discharge. HP Ice is there for the Garchomp/Zygarde switch ins which shouldn't be an issue with webs up.

All in all, this team has great synergy and most of my games end up with xurkitree sweeping with webs up. I haven't found anyjj