I think you could judge kill priority based on two angles: the general townness other players view them as, and how effective they are at lynching scum (meaning Scum would have to get rid of them or get lynched).
Actual Kills:
Vhaltz - Seems like Mitsuki was sort of medium on Townness. I haven't played a game with Vhaltz or watched a game he played in, so I don't really have a basis to judge how good a kill on defense this was.
Bard - high for townness, high for defense. I personally have a high opinion on how well Bard can scumhunt, and it would seem that opinion may have also been held by Scum.
SB - According to SB himself, he was obvtown, but I think the number of players who saw him as Town was about average. Very active in late phase organizing the lynches, so high for defense if Scum wants to no-lynch.
NNR: high priority according to obvtownness, but he is only attacking one player so for defense it would depend on whether that player is Scum (which he isn't).
Skypal: high for townness. Moderate to low for defense.
Shadoweh: moderate to low for townness, but pretty low for defense.
Zak: Low for townness (obviously!), low for defense.
Dormio: Fairly low for townness. For defense - I don't really know. When's the last time Dormio survived to the endgame?
Serela: Moderate for townness, really low for defense. Pretty sure Scum don't fear Serela lynching them.
Oarfish: Moderate to low for townness. I can't really speak to my own Scumhunting ability, and I imagine that's true for everybody.
Elieson: Low for townness. Hasn't been influential in the lynches, so probably low for defense.
Refa: Pretty high for Townness at this point.
Rawr: was in fact scum.
BT: Low for Townness, and low for influence even though his scumhunting ability is usually good.