@Professor - nice call to use the sweep, for a couple of reasons - you'll see soon enough that this guy is...not really himself right now...you can sense that he's much stronger and tougher than you would expect, and hitting him might not have as much effect as you'd have liked.
Other thing is that you are pretty high up, and there's no wall or railing at all. You have so may net successes I'm happy to let you control the direction of his fall...
So go ahead and IC successfully sweeping him before he can cut anybody.
Please be sure to
(1) mention the sense that he is - for whatever reason, there are a few possibilities - stronger/faster than you'd expect (you can see it in the eyes, or he can be screaming, or do some sort of superhuman posturing, whatever you like)
and
(2) which direction you choose for him to fall......