In my view, you should have two players who do different things. In England you have the classic tall man/target man-small man/poacher combo, but the variations are endless. But the target man/poacher combo is timeless, as is pairing a deep lying forward with a poacher, or a deep lying forward with a targetman. The problems arise when the players do the same thing, except if you have two targetmen, but only the most brutish of teams and styles employ this variation.
I really loved the Jozy/Davies combo too, as they seemed to have a decent understanding, and it allowed Jozy to be more aggressive, since he knew he had immediate support. Oh what could have been.
I think Johannson is more of a poacher, although he has proven that he can create as well. He seems like a rich man's Wondolowski, to be honest.
This would be perfect for Jozy. He's pretty much settled as a target striker even though when he first started out he played wide. I'll watch Johannson soon, but if he's a poacher, then he can slot in nicely. It would be amazing if he could play across the front 3 or behind the striker, as that would give us variation.