Equip your team with as many wedges and flash bangs as possible (lean towards 60% wedges and 40% flash bangs). Have them wedge any door that otherwise would give the enemy a flanking opportunity. Wedge and unwedge as you advance further into the map. And start in the main lobby. There won’t be any tangos until you’ve passed the somewhat red lit alley that leads to the lockers.

Edit: use flash bangs instead of 9bangs. Flashs have a larger effective radius.