Asunto: skills.

I think the most important skills for a defender depend on his role. I use my wingbacks primarily to support the midfield, because I normally only play with 3 midfielders, so my wingbacks look a lot more like midfielders than defenders. I would say, a sweeper you would primarily focus on tech, defense, and pace, since he's the last man between the attacker and the goal, but anyone you want to be feeding balls to the midfield and attackers needs pm and passing.