Alolan-Golem + Fraxure is a cool core that defines the typcal DragMag strategy. However, in this attempt to build a team (below) I wanted to bring a bunch of Pokémon beyond Fraxure that could take advantage of steel type Pokémon were gone.
Alolan-Golem
To make it a Magnet Pull set I had two options: Choice Scarf or Band or Electrium-Z. In order to break through teams relatively well and because I had in mind another scarf user but no Z-move assigned I chose to run Electrium-Z. Wild Charge for STAB, Fire Punch to hit hard Pokémon like Gourg, EQ for steel type with no Levitation and finally Explosion to get some kills if necessary. EV spread was to make it the most offensive way I could.
Fraxure
The other part of the main core. I chose to run Eviolite because it gives Fraxure some longevity. Double Dance is not really usual but with only one DD sometimes is not enough to get some kills. Against stall or BO favorable match-ups SD is a better option.
Mr. Mime
The star of the team. As a Psychic + Fairy type Pokémon, it enjoys a lot that steel type Pokémon are gone. Dazzling gleam and Psychic for STAB boosted moves and Trick for BO + stall archetype. Finally, Healing Wish to help other Pokémon to get a reboost.
Muk
Special defense Muk is just a beast. With Curse it can boost both attack and physical defense. Sleep Talk + Poison jab take many opponent Pokémon in a blink. However, main ground Pokémon in the tier like Sandslash or Golem can take it down. Thus, it was really important to add the following core.
& 
Altaria + Bronzor
Physical defensive Altaria and special defensive Bronzor do a great core setting up rocks + defogging them if it is necessary. Toxic helps to weaken opponents and helping both Muk and Fraxure for future sweeps.
Alolan-Golem
To make it a Magnet Pull set I had two options: Choice Scarf or Band or Electrium-Z. In order to break through teams relatively well and because I had in mind another scarf user but no Z-move assigned I chose to run Electrium-Z. Wild Charge for STAB, Fire Punch to hit hard Pokémon like Gourg, EQ for steel type with no Levitation and finally Explosion to get some kills if necessary. EV spread was to make it the most offensive way I could.
Fraxure
The other part of the main core. I chose to run Eviolite because it gives Fraxure some longevity. Double Dance is not really usual but with only one DD sometimes is not enough to get some kills. Against stall or BO favorable match-ups SD is a better option.
Mr. Mime
The star of the team. As a Psychic + Fairy type Pokémon, it enjoys a lot that steel type Pokémon are gone. Dazzling gleam and Psychic for STAB boosted moves and Trick for BO + stall archetype. Finally, Healing Wish to help other Pokémon to get a reboost.
Muk
Special defense Muk is just a beast. With Curse it can boost both attack and physical defense. Sleep Talk + Poison jab take many opponent Pokémon in a blink. However, main ground Pokémon in the tier like Sandslash or Golem can take it down. Thus, it was really important to add the following core.
& 
Altaria + Bronzor
Physical defensive Altaria and special defensive Bronzor do a great core setting up rocks + defogging them if it is necessary. Toxic helps to weaken opponents and helping both Muk and Fraxure for future sweeps.
