Not a bad shout on players there tbf. I think Agger should be let off as like you said he is struggling to get into the starting 11. I don't think Caulker would be good enough for CL though?
Full-Back: We need some sort of depth Flanno has been a rock for us so I think he can do nothing but grow but johnson has been a bit off this season. (Peruzzi, Alberto Moreno, Ricardo Rodirguez)
Centre Back: Agger should be let go like you said as he is struggling to break the team of late which should open up some transfer fee/wages but I disagree with Caulker, he's not a bad player but can't see him being a CL player imo. (Mangala (beast), Dede)
Centre Mid: I am a big fan of Mkhitaryan and was a bit ****** when the deal fell through from us last time but I think it would be a bit of a downer and loose too much of the budget on him as they would want big bucks for him now

(Barkley?, Rumour of Will Hughes?)
Winger: Moses will be going back to chelski so will need depth due to CL. Bernard said he wants to leave Ukraine due to the riots etc so could be a good shout? (Muniain, Griezmann, Bernard! Carlos Vela, Townsend? Wellington Nem (FM God))
Striker: I heard a few months ago Swansea were interested in Aspas so could be a good shout for him. SAS have been in too good of a form for this poor guy to break the team! He would be a good cover but a good CL cover? I'm not too sure. (Bony, Mame Diouf, Jo)