If anyone is having trouble with this achievement, trying to figure out what your loadout needs to look like and what is required for the mission. I just got it and posting this since i saw alot of confusion still.
In addition im also showing floorplans with what i did do complete it.
This is basically what I had my AI use because they couldnt stop shredding through civies which was also done in single player quickplay with AI teamates. I did use the flash launcher command when navigating the bank but only ended up using my primary the whole mission.
The Method:
Priority one: Bring order to chaos and rescue all civilians.
Priority two: soft obj & evd.
1ST FLOOR
Spawned in Entry 2, command (open>clearwithlauncher) to take over Green Zone 1 and position myself where the green dot is (behind the counter) as I took care of hostile suspects and wedging the door in front of the metal detector to avoid getting ran up on.
As we started taking control of Red Zone from GZ1 I commanded the team to (breach>C3>clearwithlauncher) and take over GZ2. I creeped up infront of the desk where the arrows are commanding suspect to me and arresting them, sometimes taking the risk and stepping into the RZ risking getting shot from the balcony.
After wrapping around the counter and behind it into GZ2 I commanded my team (breach>C3>clearwithlauncher) to take over the Private Offices room. At this point I either breach with them in support or take over YZ3 and pluggin the door that leads to the vault. After taking over the last two rooms I regrouped in YZ3 and plugging all three doors where the yellow dots are and WATCHING the stairs as theyblove to come down from 2nd floor.
2ND FLOOR
To reach second floor you gotta be careful, commanding your team to (moveandclear) once youre almost at the top of the stairs so they can properly move in. These stairs are really sketchy and with this janky ass AI you really got to support them here. Be very careful of the rooms and windows, your immediate left that leads to the balcony and that extra room, focus on those areas and the room ahead and pray they take care of whats visible in the open office space and past the balcony windows. After taking the main office space I took cover behind the pillar as i commanded my team (open>clearwithlauncher) to take over the next two rooms while supporting them.
VAULT FLOOR
Finally after taking over the top i simply went down stairs being careful of the window that is in the room across the elevator for stragglers. Command my team (open>clearwithlauncher) to take over vault. This area, because of the stairs and the super smart AI made this section sketchy. Making sure i was on the opposite end of the stairs, I would command them to (moveandclear) as i moved up in support. Being very careful and taking position where the blue dot is, i took care of the remaining suspects.
Ok NOW finally at this point after taking over the vault I had order and went around grabbing civies and evd suspects dropped leaving the C4, weapon bags and bomb in the elevator alone. To sort of myth bust some claims while grabbing civies, evd, bagged guns on map, password board, sec badge, brief case card, opening the small safe I ONLY called in the laptop as evd and DID NOT interact with it meaning on the keyboard (themyth). I went back downstairs to open the vault, interacted with the phone, stepoed out the vault to call in the remaining evd in the vault i left behind.
The mission didnt end automatically which made me think of maybe i did have to interact the keyboard on the laptop but decided to end the mission and still got the achievement.
Last three shows me voting yes to end mission, achievement pop up during eval and full completion results.
This is what worked for me and considering the AI on hard mode is practically broken, it went alright and yes flash launchers is cheese but also enemy AI is broken and friendly AI is not very reliable.