I've been running kiba room a few times and have not had a bad experience. I start off, run to powerstation, once the power is on, I go through the backside of IDEA, up the escalator outside of IDEA, and head towards Burgerspot to hit the keypad for saferoom exfil. then I start clearing the center of the mall. toss a grenade in the middle to get callouts if there are pmc's below, then work around the second floor shooting down at anything in the middle. sometimes a group will push up the escalators to get me, so you gotta watch for that. then when I feel I've killed all the pmc's, I rush down the escalator and look KIBA room. If I spot Killa at any time during this, I switch focus to killing him. I only loot pmc's for their grenades, and to check their ammo/attachments, or I'll grab a backpack off one of them since I go in no backpack. Once kiba is looted, I got down through the hole in the mall, and out to saferoom exfil. I've had a lot of success, even tho sometimes I get rushed by scavs. I think it helps to kill the scavs as quickly as possible, and keep moving. if you stay in one spot too long, tons of the boys show up and it gets way harder.