I think making me killable would've made it too hard, but perhaps if I was BP it would have worked out. I'd still be lynchable, but not shootable.
Honestly getting 3 people to stay alive and 2 people to get lynched was much harder than it looks. Even in a town where I could predict the lynches, I still had to predict night shots for 3 nights in advance. That's incredibly difficult for anyone of either alignment to do. What happens if I pick a scum I think will live who messes up and gets instalynched or vigged? Now I have to wait another cycle to complete my wincon.
I think in a game with a decent town and scum team this wincon would have been nearly impossible to achieve, because I would have had very little influence over lynch affairs and it would be nearly impossible to predict the lynches as easily. I would've lost simply because I would not have had enough time.