Need some help, 2-1-3-1-3 (probably? :P)

I'm playing against a team, only slightly stronger than mine, that is using this formation:
ST-ST-ST
AMC
MC-MC-MC
DMC
DL-DR

What should I use against this formation? I'm only level 4, not really into football in real life, but oddly enjoy this game :P So yeah, not familiar with stuff like this and I need help ^^

It's an illegal formation so you'll have 80% possession

I'd try
DL DC DC DR
DMC
MC MC
AML AMR
ST

And focus passing down the flanks