You should use DUSK FORM
-It's much more faster, although midnight is more bulkier, but it’s defence still don’t help.
-It can learn accelerock, which is the only rock type move that has propity, and weirdly, midnight form can’t learn it
-It have a better movepool than midnight form.
So you should use dusk cuz the reason above, but it really depends your own.
Here’s the Movepool for both:
Lycanroc-Dusk (M) @Choice Scarf/Focus Sash/Live orb
Ability: Tough Claws
EVs: 252 Atk / 4 SpD / 252 Spe
Jolly Nature
- Accelerock (Always move first)
- Psychic Fangs (Coverage
- Swords Dance (Boost)
- Iron Head (Stab+Coverage)
Lycanroc-Midnight @ Life Orb/Choce Band
Ability: No Guard(Won’t miss iron tail and stone edge anymore!)
EVs: 252 Atk / 4 SpD / 252 Spe
Adamant Nature
- Stone Edge (Stab)
- Iron Tail (Stab+Coverage)
- Close Combat (Stab+Coverage)
- Swords Dance(Boost)