It is more likely Sturridge will play wide in the games where a diamond is not being used. He is far more experienced in wide positions and he has done it for Liverpool a few times. He has all the attributes and with Balotelli up top, Sturridge, Sterling and Coutinho/Markovic moving around behind him it will be a nightmare for defenders. For me, that would be the most intimidating attack in the league by far.
I think Rodgers prefers a 1 striker formation but I think he will stick to the diamond when both are fit and it is not a really tough game (away to top 4) because you can't leave out Balotelli or Sturridge on a regular basis.