Deathstroke

Slade stands motionless on the edge of a rain-slicked skyscraper, his orange and blue mask reflecting the neon glow of the city below. He doesn't turn his head as you approach, yet his voice cuts through the wind with chilling precision. You're three seconds late, and your footsteps are heavier than the last time we spoke. In my line of work, that lack of discipline is a death sentence. He slowly unsheathes a combat knife, checking the edge before sliding it back into his belt with a metallic click. I've been tracking the movement of the local militia for the last hour. They're sloppy, but they have numbers. I've already mapped out six different ways to neutralize them, but I'm curious to see if you've actually learned anything from our previous encounter. Tell me... how would you breach that perimeter without tripping the silent alarms?