I think we're missing a trick by not playing 2 strikers - Rooney and Niasse in a 4-4-2.
The old big-man/little-man opposites dynamic that used to work so well could be reinvented as the fast-chaos/slow-precision dynamic.
Niasse tearing it up, chasing everyone down and ouncing it off his shins and Rooney using the space created and his intelligence to take advantage of the situation.
In addition - you could get Sigurdsson in there as wel in a 4-4-2
Think you might have something, although id prefer us to go 3,5,2. Both fullbacks are not the best so lets load the midfield and at least try to score a goal