>>31328234It's customizeable. A few points:
Max HP is always a good idea. Use 248 HP EVs to reduce Stealth rock damage.
The more Attack, the better. Marowak is good because it beats lots of things 1v1 with resistances and high damage. Additionally, Thick Club is more effective when you invest more. With 0 Evs in Attack, you get 392 Attack. With full investment, it's 568.
You can also run some Speed EVs. I like 136 EVs to outspeed uninvested Celesteela, Tyranitar, and the base 60 mark. You can run more or less, it's up to you.