It is a really good question - I haven't seen enough of Connolly or Balogun yet to know how they play, but at first glance seems to be two types where Connolly and Watmore have similarities as do Balogun and Sporar (possibly more typical number 9s). CW seems quite set in his formation and style of play, so I suspect we will see a bit of a mix and match, but likely with one from each pot at any one time, so:
Connolly and Balogun
Watmore and Sporar
Connolly and Sporar
Watmore and Balogun
And then subs to keep that type of mix up front as required. As others have mentioned he likes to swap his forwards at the hour mark in order to keep the intensity and he now has the mix of 4 to allow us to do that without disrupting the style. Imagine being a defender chasing Watmore for an hour and then see Connolly coming on with fresh legs or vice versa.
I could, however, be talking out of my hoop.