Just in case you don't find people and want to still reach the cR cap here's what I used to do to max out every day:
- Play Arcadefight within the Firefight Matchmaking playlist
- Select the Sniper class
- Find a sneaky glitch spot and snipe everything, especially vehicles.
This used to work a charm as it'd always give you a constant flow of medals due to the Sniper Sprees, Headshots and DMR kills giving you the Headcase medal and such, it also levelled up Commendations relatively quick.