This area has a handful of guards and at least two angels inside. You can easily get rid of the angels by sneaking inside yourself and performing Melee takedowns. There’s also only a handful of patrolling guards here so you can pick them off first and work your way with the other targets. There’s also a ladder that you can take to pick off the sniper near the alarm. From there, you’re free on how you dispatch the other guards. There’s a lot of cover so it’s quite easy to sneak up on them even when they’re alerted.