I have TDM Master on two of my accounts. Try using a silenced weapon, UAV, Guardian, and CUAV. Camp on a room like the second floor near the A spawn in Standoff. Use the Guardian to trap enemies coming up the stairs and use the spawn flips to your advantage. If the spawn flips and you find yourself on enemy spawn, things will just get faster and consider it a blessing. They will try and flush you out of your room.
AN94
-Silencer
-Fast Mags
Lightweight or Flak
Toughness and Scavenger
Dexterity and Tac Mask
Perk 2 and 3 Greed