This is my first post, but have you guys tried this set?
Lurantis @ Firium
Z
Ability: Contrary
EVs: 4 HP / 252 Sp.Atk / 252 Speed
Timid Nature
- Leaf Storm
- Sunny Day
- Hidden Power Ice/Ground
- Weather Ball
Thanks to Z Sunny Day, Lurantis gets a bit of a boost to it's speed stat and gives it more potential to use Leaf Storm.
Weather Ball is turned into a strong fire move, allowing it to hit Steel, Grass and Bug types that will otherwise resist it's main stab.
And hidden power Ice to hit Flying and Dragon types.