Can you give an example of how 424 should be played?

I guess

ST ST
AML AMR
MC MC

DL DC DC DR
GK

What instructions for it? Arrors, settings?

Also what about this below formation, how is your experience with this?

ST ST >> Most powerful ST with forward arrows
AML AMC >> AML + AMC forward arrows
ML MC MR >> ML with back arrows MR+MC forward
DC DC DC >> All back arrows
GK

I've had pretty decent results with it. I swap the AML to AMR depending on the weakest side of the opposing team, then decide to play down flank, one flank, or mixed, depending on the weaknesses of the opposing team.

Do you think ditching the MR and putting a AMR would be better?