We would vtnl if Pie actually DOES get modkilled.
Again, the plan doesn't really make sense to me.
If Pie's lying, he hammers the lynch and ends the DP. That doesn't mean he's automatically scum, since he could be covering for a different role as town, TP or scum. That might lead to an opportunity for Pie to confirm his actual role in the next DP, but since you've said you'll just Vig him during NP1, you've made clear that he won't be given the opportunity because you'll presume him to be scum. If he's scum, that's great, but if he's not, then we might be looking at 3 town/town-aligned TPs biting it over the course of DP1/NP1.
If Pie's telling the truth, then he just gets modkilled. That's not the biggest of deals since he's a TP, but he's also skewing the numbers in favor of town. That2 said as much in response to WyIted - town won't automatically lose if it loses its majority, meaning that either or both you and Pie (depends on if we believe both of you and how each of your TPs align) are automatically counted as a part of that majority. In this case, we're confirming that Pie was effectively a part of the town majority, meaning that we'll still be down 2 assuming an NK goes through. That's the least bad of these options, since it doesn't result in a potential mislynch/NK/Vig all hitting town/town-aligned TPs, but it's a stretch to call that beneficial.
I just generally don't love the strategy. It's also complicated by the fact that it requires that a majority of us be on the same page about being willing to lynch Pie if he doesn't do it. It's nice that the Vig would at least partially confirm you if you use it, but doing so doesn't require that we get Pie to attempt to hammer.