For the malamar, I personally recommend a specially invested rest talker. With this spread it will be able to tank all kinds of hits and get its health back with rest.
The rotom fan looks more like it should a defesnive vatiant since you're running will o wisp and not scarf. This set could work for you.
Rotom-Fan @ Leftovers
Ability: Levitate
EVs: 248 HP / 248 Def / 8 SpA
Bold Nature
- Will-O-Wisp
- Thunderbolt
- Air Slash
- Pain Split
As for the golurk it is your decision what you do with that, though the dynamic punch will be expected, it's like the only reason to run golurk in the first place. Choice band might be good but it's your choice.
As Aero said give the typhlosion a choice scarf, also replace what he suggested with extrasensory and hidden power grass.
The crustle would be good for stealth rocks, entry hazards are always nice to have.