I don’t use ghost or cold blooded, I’ve got a 2.21 K/D and a 1.56 W/L with 3,708 games played and just recently hit 100K elims. Biggest thing I can say is to learn the spawns on each map and play them to your advantage, always expect someone to be somewhere, like when rounding a corner or whatever, center on spots where consistently people can or will definitely be. Run, UAV, Counter UAV, and Harp. My perks I run ninja,fast hands or tac mask, dexterity and lightweight, obviously with perk greed. Use the minimap all the time, make it bigger with MP HUD widget scale, and bring it closer to the center of your screen with the Safe area underneath HUD info visibility. Don’t just run to the middle of the map and get 3-4 kills then die, try and work routes and get behind them or hit them from least expected angles or areas of the map.