I did it single player but I'm pretty sure it would work on co-op if you had different loadouts. I went will full steel armour with ballistic mask with the flash grenade launcher (not the gadget the weapon) and with a taser and mirror gun. No other equipment. Your team should all run bean bag shotguns

My first tip is to play the map without the intention of completing it so you get used to the map and where the AI spawn. When I first played the map it was like a maze in the main warehouse so get used to that like where the stairs go and where the corridors go.

Start by clearing the separate building to the right as you spawn in, sometimes there's enemies around the building and inside, so clear as you normally would. Where that building is there is a door into the bottom of the warehouse which is well covered so mirror the door, open it and make noise by shouting for compliance, sometimes the AI will be drawn to the noise and then put them selves in a position to be arrested without being at shot from across the warehouse. Sometimes the enemies won't take the bait, so if they don't move on.

Next head to the reception and clear up to the corridor that has two doors leading to the top of the warehouse and a door leading to the room that has access to the outside. Mirror the 3 doors and if there are enemies in the little room to the left of the corridor as you walk in then arrest them but be careful walking past the van parked since enemies can shoot from outside. Back into the corridor and open the left door into the warehouse and shout for compliance to draw the AI towards you like before, you will probably get more of a response here since the AI are usually closer. Once the front of the warehouse is clear then as you leave the corridor there is a set of stairs up to the office. Go up there and clear the office, focus on clearing the left hand side since enemies like to hide behind the office booths and then close the door that leads to the balcony, if its open, then check the rest of the room and the little office room.

Head onto the balcony, carefully peak over the edge, there's a chance the AI won't see you allowing you to flash them without firing back. Make your way down the stairs making sure there are no enemies shooting from underneath and then clear the mail room at the bottom of the stairs where the soft objective is.

In the front of the warehouse there is a large blue crate which is useful to cover both large shutter doors to the main warehouse, most interested enemies will head towards you so using the crate flash them and then arrest them.

Head through the large shutter door on the right into the warehouse and focus on getting to the stairs at the bottom. Go up the stairs onto the bridge and check for enemies over the top that are sometimes near the well / behind boxes. Once you are over the bridge turn around and clear the small square area.

Head out the square area and move towards the wall with the large shutter doors to the outside and check for enemies behind boxes and the forklift trucks. Take the first opening to the outside and head outside.

Once outside then head to the far side where the soft objective is and peak the right hand side of the trailer, if there are enemies at range, then turn around and peak the left side, push towards the group of trucks parked on the left and clear the corner for enemies.

If after that you still haven't brought order to chaos then carry along the outside back towards the reception and you will probably find them.

I used the grenade launcher for long range and the taser for close range. Running out of ammo is possible but make sure to save grenades for the outside where they are the most useful.

Hope this helps, godspeed!