Dependent on form I think I'd start the summer with -
Cook
Robson
Root
Bell
Morgan
Stokes
Prior(Buttler close)
Broad
Jordan
Onions
Anderson
I haven't picked a spinner because noone stands out at the minute, but if say Borthwick started the season well then he could be in with a shout. However I think that side has a good balance, as you can use Root for some spin overs.