Solifuge.
a. What do you know about this setup, if anything? Do you have any game-specific tips or tricks to reveal?
Solifuge: Having been one, what do you think is the benefit of being a (town) Knight is to the town?
Being a Knight makes it very easy to play a bit the game a bit riskier. Of significant value is your ability to "tank" for the town, attracting Scum to you by posing a threat to them; the role is best served in the hands of a skillful player who can make the most of their durability and spearhead the scumhunt. If you have a small confirmed town-role group, you could also use it for a number of gambits; acting as a spokesperson for an investigator, safely taking role-redirections on yourself, etc. You don't need the trust of the town to earn the Scum's enmity though, which makes the ability valuable for early game as well.
As for the role, I was never able to figure out the exact mechanics; I did learn that I was resistant to at least one night-kill by a Demon, which let me know that a Demon had gotten into the game (or as in that case, back into the game via Priest). On that note, I'd advise anyone who notices the activity of a Demon after a Priest raises a player to mention it in-thread. It helps ID the revived player as a threat.
I have yet to browse Supernatural 3 and 4, but intend to before we're too far along. The roles and some rules are obscured by flavor, which leaves a lot open to interpretation. I suspect that, after such a long hiatus, Meph is probably going to be trying a new flavor of Scum this time, since to do otherwise would play rather anticlimactically. Metagaming aside, we shall see!
b. Who would you most prefer to be on a scumteam with you? Do you enjoy playing scum?
I do enjoy playing scum, because it's easier for me to play off the existing suspicions of others than it is to build my own cases. Though I'm no master, manipulation is one of my fortes.
Anyway, I hate to sit back and watch, but I'm going to for a bit longer. Not even posing a silly question, I'm afraid. =(