I think we should start Vardy and Kane up front together - be that in a 3-5-2 or a 4-4-2.
Vardy is too good and too hot to leave to a bench role... and his skill set is different enough from Kane's that I think they could well together.
Plus both will get stuck in and work for the team, so that won't be an issue either.
I'd go:
Butland
Cahill ---- Stones ---- Jones
Walker ---- Henderson ---Dier ---- Young/Delph
Sterling ---- Kane ---- Vardy/Lingard
Or something like that... could have Cahill in at CB and Walker as WB.
Guess the problem is that Dier and Henderson is such a bleh midfield... and Sterling isn't really a number 10, but I think Vardy and Kane together would be strong enough.