If kyan doesn't get lynched today, then yeah, I'm parking my roleblock on him.
Personally, I'd rather we lynch him today. Keeping kyan alive at this point means that I'll have to roleblock him every night until scum decides its a good night to get rid of me. That will probably be tonight while the odds of kyan hitting town are still a bit better than hitting scum. My flip will prove I was right, and the next day everyone can vote off kyan.
Lynching him today, however, gives me a chance to block the scum night kill tonight.
And if it turns out that kyan really isn't the SK and I managed to block the scum kill, then at least scum will be down one more.