Looking for advice on a semi-competitive team idea

[TheMuffinDragon]

Hello! I'm just getting into breeding and wanted to build a semi-competitive team for battle-spot. I have a general idea for a team I want to put together loosely based on Belly drum Azumarill, Mega-Kang and Amoongus and I do not want any Legendaries in it for now.

I'm just looking for pokemon ideas currently not EV spreads or specific movesets yet. Pokemon I have in mind right now are Aegislash, Scizor, Metagross, and Gengar. I'd really appreciate some advice on a strong non-legendary team surrounding these three pokemon. Let me know if you have any advice or if this is not enough information to go on :P