Ok so what you wanna do is pretty simple. Think of it as you, having 4 objectives. Disguise, Code, Card and ID. Bring an infiltrator with a skill tree that includes breaching charges. Press start when the game loads and after that place the breaching charge Asap. Then get to the bush and do a cam lure(You needa do it) Lure another guard for a disguise if possible tho. After that run into the building and go for the account manager(first floor room) Hack it and go to the second floor, when you are there run to the guard in front of the manager's room and get outa his sight so that he comes to the nearest office and then shoot him. Enter the manager's office, start hacking the manager's pc and crack the safe while the hack is done. After its all done go, grab the ID, Run to the basement and just kill everyone there. Open the vault, blow the charge, enter, grab the ID and escape. You don't care about the guard who's coming.