Let's see. We know the following.
I claimed SK, and the following are true.
Almost50 was the Dietician
Key, Trans, Godel, UC, and Math were all VTs
Assemble was Mafia.
Claim wise, Fitz is the Roleblocker, and I am the SK.
This implies that unless Fitz' claim was false, you are the last Mafia member, and you ate north.
So, here's the question. Why are you debating whether Fitz is Roleblocker or not? The only reason I would think of is that you ate north, and he was the Roleblocker (if Fitz is indeed lying). You're getting pretty desperate for a win if I do say so myself.
So, what is the case?
Are you partners with Assemble and you claimed Assemble was scum just for Town cred at the end of the game, knowing full well he was? If so, he asked you to do the Night 3 kill just so there's one larder concealed in your body.
If you are really VT, then the "roleblock" on north would make sense, as that's who died last night aside from Assemble, and that would make him Mafia, but I highly doubt that's actually the case, and I'm more inclined to believe that you are the last Mafia.