Scorpius feels kind of guilty.
About many things, really, it's one of the numerous emotions he's kept a tight lid on over the past three years. Right now, though, what he feels guilty about is spending so much of his free time with his new boyfriends rather than killing mals. Obviously he enjoyed that time with them, but he still has to make up for it somehow. Night patrols aren't as heroic as rescuing children being actively targeted in the middle of class or while trying to get their food, but he's not doing this for the heroism; he actually genuinely wants to save as many kids from this infernal place as he can.
Sure, the one in four odds of survival inside the Scholomance, with its ton of wards and nearly airtight separation from the outside world and relatively few maleficaria (only the ones that manage to squeeze in), beat the—what, one in ten? one in twenty?—odds that they would be facing outside. To offer sanctuary and protection to all the wise-born children of the world, or something, is what the school was built for, because wise-born children get nice and plump with mana as they go through puberty while conversely being much less skilled (and therefore easier targets) than adult wizards. So of course all of the magic-eating monsters in the world will target them, and before the Scholomance existed wizards had to have a metric ton of children just to stay at replacement, and mundane-born wizards were a much larger percentage of living wizards than they are now.
Now the Scholomance exists, and the odds of survival in it from start to finish are way way better than that, but one in four is still not good enough, not in Scorpius's opinion. And every mal he kills is one fewer mal that will be around to eat some kid in the morning. Plus, as a bonus, he gets mana from killing maleficaria anyway. He's putting his finger on the scales, and as a result the cohorts of kids that have coexisted with him in the school have had some of the highest survival rates in recent history.
And the price is that sometimes he skips sleep because he's feeling guilty for not going patrolling earlier because he was spending time with his boyfriends. He wasn't lying to Edmund, he really doesn't need that much sleep, and this isn't even two nights in a row, he had a break in between.
It's fine. He's fine.