Personally, SBC, I think you should have stuck with Vanilla Townie with a Mind shield as your fakeclaim. With both Detective and Agent in the game to *prove* your claim, you could have gotten much further while people struggled to determine what was going on.
With the mind shield you were immune to both the Mind Stealer and the Psychic Warden, and at that point in the game the Military Scientist, Intelligence Scientist, and Observant Guard were all dead. Those were the only roles that even had a chance of directly threatening you and the Intelligence Scientist's tech choice wasn't actually a threat.
In your place I would have killed ToonyMan N3 in order to mess up town's ability to use his blocks to prove that someone didn't do the night kill. That would leave Tiruin and Toaster the most likely lynch candidates since they were unproven. N4 I'd probably kill Jim, since his abduction ability was so powerful.
At that point...it would depend on what people were doing and what they were thinking.
Victory given the situation Day 3 would be a long shot no matter what, but this would have given you the best shot of whittling down town and causing them to mislynch people. Eventually they'd probably determine that you were a dopp leader and lynch you, but I don't think any fake claim would serve better. Eventually, if they use their powers and deduction correctly, they'd be able to clear pretty much everyone else, but the power of doubt is very strong. People tend to trust Agent/Detective results much more than the possibility that there is the one role in the game that's going to circumvent those powers.
Overall, if you're going to fake claim in a game with open roles, make sure you know the consequences of the role you're thinking of fake claiming as. A fake claim is only as useful as its ability to mask what you are. If there are obvious flaws in your claim, either because you can be shown to be lying due to how that role works or because that role is dangerous to town, all you're doing is making your situation worse. Better to be suspected scum by your actions than proven dangerous or a liar.