Gonna drop an offensive rock core for USUM Monotype because all the essential pokemon for rock like cradily and Diancie are back, so I decided to post this core.
here are the movesets:
https://pokepast.es/21256317c6c28be3
The first pokemon that I thought of when thinking up the core was Minior. Minior is a great shell smash sweeper for rock that can get up a shell smash and start sweeping teams. He isn't really a common pokemon in the usum meta, but I do believe that when built around, Minior can completely broom unprepared teams. The biggest problem with many setup sweepers such as minior are the removal of threats, like priority users in Azumarill, scarfers like weavile, and defensive pokemon in general, for example bronzong and Ferrothorn. However, one of the best Pokemon for threat removal are trappers, and rock has access to an amazing steel trapper in Golem Alola. I chose the banded Golem set, as it gives it sheer power that even the most defensive pokemon fail to wall. Wild Charge and Stone edge are its primary stab moves, and Earthquake and Fire Punch are there for Golem to kill the steel pokemon it is supposed to check. Its electric typing provides this core with an ok switch in to steel attacks, boasting a base 130 defense stat. Golem Alola's ability to remove checks was what made me select it as Minior's partner, and im pretty sure even if i just chose Minior, Golem would end up being on the team anyways. While Golem acts as a steel neutrality for rock, minior on the other hand takes neutral damage from grass,fighting, and is immune to ground moves that hit golem super effectively. With Golem being able to remove counters to minior, Minior is then allowed to set up a shell smash and start sweeping. I gave it Acrobatics and Power Gem for stab(I made Minior a mixed sweeper because I don't like the fact that the other physical moves miss) and eq for coverage.
There are a few problems with this core, as the water weakness is a glaring issue, but its gen 7 and cradily is allowed anyways. Another issue is the problem that some pokemon are still able to deal with both golem and minior, such as raichu being able to outspeed and KO both in electric terrain. however, rock as a type in gen 7 has a bit more tools to utilize, and if this core is chosen, Im excited to see what else the community decides to use to bolster this core.
Edit: I was looking through my post, and realized that my grammar was garbage, but it's like 10:00 PM so it's whatever(Sorry)