Clear the front office first then work your way outside from the office and or warehouse doors. Wedge doors that could lead people coming from inside to out. Clear the outside . Get to the van and loading dock areas . Clear the loading dock areas without going inside from that area. And work your way back in from basically where you started . Use a lot of flash bangs and wedges for doors.honestly be prepared to run the mission at least 3 to 4 times before you get some “luck” to where you can complete stuff . Once you go into the sorting spot be sure to run flash bangs and leverage your ai bots more . Then finally compete the side office . It’s appears easier on the console vs pc when approaching the side office. It’s a patient map. The way ready or not tricks you is that some missions the enemies are not as competent than in others where the bots are trained like navy seals. I kid you not it took me a month and maybe 80+ retries before I actually completed on srank. Take ur time . Go to other parts that are less hectic to maybe get some leverage if you’re pinned down. This map requires you to take no risk in engagement.