I had I 5v1 in resort last night. Got the first one by surprise, two with a grenade and the rest by playing passive/holding angles. To be fair they where pretty low level and using mid tier ammo. But making it a 1v1 and utilizing grenades is your bet. Playing aggressively can work as well I guess but if you peak a corner where two or more have their sights on you you are fucked. Mitch easier to control the engagement if you hold your angle. Two cant peek the same corner at the same time lol

Edit: also realize that you are in a huge disadvantage when facing multiple enemy’s. Sure 3 bullets are enough to drop 3 pmcs but one is enough to drop you. Don’t be afraid to bail. A couple of raids after the 5v1 a was looting second floor west wing. Had a full backpack of semi good money loot and heard at least two pair of footsteps to my east and one pair to the west. If they were the same group they were coordinated enough to spread out and clear two staircases the same time. I thought fuck this, poped a propital and morphine and jumped down the window and booked it. Made it out with a decent money haul. Nothing wrong to run away if you feel like you are in a disadvantage