Ideally I'd have someone with more maturity and defensive instincts in the back three to go with distribution skills, but that person isn't in the Liverpool squad. To me, you can't play a back three of Toure/Skrtel/Sakho because there's not enough ball skill. You need two passers like Can and Sakho or you can't threaten the opponent enough to keep them from pressing hard enough to force errors
There's a really good young defender at Villa named Tiago Ilori who'd be a good fit; maybe LFC could get him...
Why does Mignolet always run to the edge of the area like he wants to counterattack if he's just going to give up, walk around for a while, and either roll the ball to a defender or punt it?