Most my battles use Flareon, Vaporeon, Magmar, Gengar Slowbro and Tentacruel.

I don't have a Muk, Lapras, Dragonite or Gyardos, common monsters to hold gyms, and my Snorlax is ridiculously weak.

Still, I easily collect rewards from 3-4 gyms a day if I go out there.