I'm assuming scum have the blade because of the six mechanical possibilities here- town!Tykan has the blade, scum!Tykan has the blade, town!Tykan is saved by towny with blade, scum!Tykan is saved by towny with blade, town!Tykan is saved by scum, scum!Tykan is saved by scum, the only possibilities that are not either ruled out or extremely unlikely are ones in which Tykan is scum and was saved by scum, either himself or another.
Tykan has claimed staff of life, so if they had the Blade as well then they are scum. If they lied about their item choice, it would almost certainly have to involve them lying about their pick placement as well, and only scum can be sure that falsely claiming a pick spot will not result in a counterclaim. If they had not lied about pick, that likely would have opened them up to counterclaim. So if Tykan had the blade he is scum.
I don't think cancelling the lynch can be pro-town unless you have mechanic confirmation that the person up for lynch is town, and I don't see any way that any of us could have had that on a hypothetical town!Tykan. Additionally, even allowing for suboptimal play, if anyone was that bullish on Tykan being town, surely they would have said something yesterday? Nobody who didn't vote for Tykan yesterday was really defending him like a towny would have if they were willing to use the Blade. So Tykan was not saved by town.
Scum can always outperform using the Blade on a towny with using the Blade only once a teammate comes up for lynch. Until the Blade would target one of their own, any mislynch that using the Blade sets up could be accomplished by just not using the blade. Mislynches are good for scum, so they have no incentive to use the Blade until it would not be a mislynch.