So, getting Gabigol seems to be the next move, and it totally makes sense. He has potential, would accept not starting every game, and is versatile enough to get plenty of time on the pitch. And much important, he is under 21, and therefore replacing Zaza with him would free up space in the squad for an extra midfielder - because we are stacked in midfield and due to us not having four club trained players, it would harm our depth if we were to get rid of too many.
I don't know if Zaza or Mandzukic would leave though, but i hope it's Zaza. In midfield i just hope we keep Pogba and then we would be set if we off load two players from Hernanes, Pereyra, Lemina and Asamoah. That would leave us with an extremely strong team. If Pogba leaves he needs to be replaced, Herrera has been mentioned, could be him - i struggle to see other obvious targets at the moment (i'm not keen on Witsel).