So, anyone already working on competitive sets? Currently thinking up doubles sets for VGC/Battle Tree.

Here's what I'm currently using:

Tapu Koko @ Terrain Extender
Ability: Electric Surge
EVs: 76 Atk / 180 Sp. Atk / 252 Speed
Hasty Nature
- Thunderbolt / Volt Switch
- Dazzling Gleam
- Hidden Power Ground / Hidden Power Fighting / Brave Bird
- U-Turn

Xurkitree @ Life Orb / Assault Vest
Ability: Beast Boost
EVs: 78 HP / 180 Sp. Atk / 252 Speed
Timid Nature
- Discharge
- Hidden Power Ice
- Energy Ball / Dazzling Gleam
- Signal Beam

Dugtrio (Alola Form) @ Darkinium-Z
Ability: Tangling Hair
EVs: 252 Atk / 4 Def / 252 Spe
Adamant Nature
- Earthquake
- Iron Head
- Sucker Punch
- Stone Edge

I'm not sure what to use as my fourth. I do really need a ground immunity or resistance but I have to be careful with what I use, considering how fucking hard a boosted Discharge from Xurkitree hits.

What are you lads working on?