I think 3 at the back is the only way to go. Either 3-5-2 or 3-5-1-1. Our best position is CB. Allows all 3 of papastathopoulos, manolas and kpaps to play. Also allows holebas to play as a wingback which is probably the best spot for him.
........................karnezis
............kpaps.....manolas......sokratis
Torosidis....samaris....maniatis..........holebas
............................fortounis
.....................mitroglou...karelis
Or
.............................karnezis
...........kpaps........manolas.......sokratis
Torosidis............................................holebas
.............maniatis..mantalos...samaris
........................fortounis
..................................mitroglou