It doesn't really matter if Flayer targets IW or not - if IW hits me and impedes potential investigative roles, you have a lynch target. Flayer should target who they think is mafia.
My plan: I think GN and FFQ should target me - otherwise, I'm fine with the other investigative roles (and Crusader) looking elsewhere if they want. I would prefer as many as possible so the GN can blend in easier, however.
When you see me as town, my recommendation is to just try to be subtle - if you had a mafia read on me, use one of the many valid excuses presented to move yourself to neutral. Or from neutral to town. Or even don't change your public read, but just say you prefer a different lynch target. Play the same way you have been playing, just with the knowledge that I'm town. Don't even soft claim unless absolutely required. It clearly only takes a tiny bit to move the scales away from me, given that I've survived at the very end twice.