I'm slowly starting to love this new killer, specifically with a certain perk.
I'm not really going to contribute feedback to the power or anything, but I really need to emphasize that, as a stealth enjoyer, Unknown has some very fun opportunities and aspects from my testing.
Granted this isn't specifically for gettings wins: The build I've been running the most is Mindbreaker, Dark Devotion, Unforseen and Insidious. Insidious is the most important one, specifically.
"But Chaos, his clones have an aura around them" I may hear you say, but that's exactly it. If you drop a clone and stand in the same spot as it, survivors will see the aura and not yours.
From my testing, you use Unforseen to help a tad on regression and both Unforseen and Dark Devotion, when applicable, to send off your terror radius to help make survivors more defensive. If done right, it gives you a window to patrol around more to place more minions in high traffic areas. Mindbreaker just helps if anyone sits on gens with aura reading. Mix it in with some hits, downs, M2 shots and so on.
Absolutely make sure if you use M2, down or force survivors to cleanse it or else Insidious won't work, since survivors can stare at you to know your location.
Once established where gens are being done, stand on a clone and Insidious it up. If done right, survivors will willingly approach to 'cleanse' your clone and not know it's you until it's too late. I've gotten so many survivors with it in the PTB so far and a lot of feedback on it being terrifying when I just turn rapidly to stare at them. You can also mix it up and stand in the open, since aura reading really works the best through walls anyway.
Probably isn't something I found first, but I still felt the need to share this because it's honestly my favorite perk on him now for jumpscares.