If we plan on playing Benteke as a lone striker and feeding him with crosses, then I presume the width will come from fullbacks since Couts and Firm are more central, and don;t cross.
If this is the case, Moreno and Clyne are ideal however it poses two issues:
1) Injuries - if either are injured, we have no back ups who can attack as well. We have Wisdom, etc but they're not natural attacking full backs so we will lose that threat.
2) With having aggressive full backs, we need a midfield, more importantly a DM who can drop back and protect the defence and cover the space. Can can develop there but I'm not sure he's ready just yet. If this isn't addressed, we will be exposed and there is a fear we could concede another 50 goals this season.