4 degree washout?
Something of that order at the wingtip, I was told when annoying the builders at Vero Beach.
However, by how much does this overcome any advantage at the root and inner wing from reduced AoA generated by prop wash? No root spoilers, maybe, but I have only seen Senecas with stall strips just outside the outer prop wash extremity.
Vortex generators ahead of ailerons on later models.