It took a bit to figure out the strats, seeing as I had to adjust a bit from Zaarock's 1:17 run. I started using EMP's to safely get to the stairs, although if unlucky the enemy can just headshot you and kill you if they feel like it. I also recommend dropping a grenade while sliding to the 1st rescue central as well as switch to your Heavy Machine Gun. It's usually rare to get a clean single grenade kill all enemies, so it's just to make it safer.

The ending still had 3 enemies alive, so that lost a bit of time I guess. I also recommend dropping a grenade while sliding to the last rescue central just in case you get lucky kills. I tried for a bit to get a 1:11, but the runs just didn't want to let me, which is a bit disappointing but I'm still happy with the run!