Ball Control (RCV) and Skill Training, Ball control, playmakers, skill training Options

[BigJock]

So from reading this forum i think i have learned which skills to train for each player type.

Defenders - Edu, Tackling and marking.
Midfield - Edu, Dribbling and passing.
Forwards - Edu, Shot Power and Shot Accuracy

So is Ball Control a skill that is usefull to all players or better for Midfield or Forwards?

Is Passing only usefull for Midfielders?

Also is it a good idea to train all Stats for all players up to a certain level maybe 10 for example?

Does a good playmaker need to be trained in all skills?
Is the best position for a playmaker CM or can they be any position? Can you have 2 playmakers 1 on each wing for example?

Should i train my midfielders in Shooting also so they can help score?

Any help appreciated thanks!