I would also recommend this formation, as I use it a lot (I call it 4-2-2-2- advanced) with similar kind of players. I would however, recommend not using both centre midfielders as playmakers. Both Song and M'Vila could play the "ballwinning midfielder" very well. This formation is already very attacking, so let one player do the dirty work of winning the ball back when you loose it.
You could also try this (4-2-3-1) formation:
GK = Sweeper Keeper
RB/LB = Full Back Auto
DCR = Limited Defender, Defend
DCL = Ball Playing Defender, Defend
MC = Deep Lying Playmaker, Support/Adv. Playmaker, Attack
MC = Ballwinning Mid., Support
AMR = Winger, Attack
AML = Inside Forward Support
AMC = Trequartista/AMC/Adv. Playmaker, Attack
FCR = Poacher/Adv. Striker
Depending on who you use (and if they have a good day at work), change the playmaker in MC and AMC position.
Rigid Play - Control
Passing - Short
Less Expressive - The team will take your instructions and shouts better. When you have players with good decision and calmness skills, adjust their creativity individually.