I was gold 3\2 player now i finish elite 3 for the first time.
lwb,rwb : Always Overlap
Cb: Don't Touch
Cm: One get in for the cross ( the more attacking one ), the other stay on edge of the box, Both of them stayback while attack
Cam: Stay forward, Get in for the cross
STrikers: Get behind , press back line
Put attacking mentality on the d-pad in the begining of the game ( Important : always play this formation in attack mentality )
Your Cm's are realy important you need a lot of stamina , one fast and good on defense and pass, the other all rounded ( ex: Kanté and Delle Alli, Emre Can and herrera, tolisso and Sanson tots, vidal, naingolan etc... )
Try to always keep your cm's neer your defence , don't leave a space there , it's one of the ''secrets'' of this formation, defend with cm's and you can also begin the counter attack with them.
Don't forget to use your lwb and rwb it's the advantage you have in attack compare to the 41212 narrow ( exemple of good use: Rwb one two pass ( L1 X) with the right cm , rcm give it to the right st , right striker give it to the rwb in his run , then cross or shoot \ Rwb One two pass with the Right striker , right striker pass it to the right cm, right cm give to the rwb in his run)
Your middle cb play like a real cdm and stay back not like in the 41212 (2) , better have a good passer in this position med\med or high\med work well.