What works best with cartridge razors for closer shave, Comfort, no cuts: Shaving cream , or Shaving gel ,or Shaving Soap ,or Shaving Foam (in cans)
In general, a shaving cream or soap used with a brush trumps gels and foams regardless of the razor. Creams vs. soaps depends on the particular cream or soap. That being said, a good canned foam like Barbasol is all you really need for a cart if budget is a concern. YMMV. I find gels hard to rinse off carts or even DEs. If you must use a gel, thin in out on your face with lots of H20.