DL/DR works just as well blocking an AML/AMR. A lot of people think the DML/DMR is a must have against AML/AMR but in all honesty, DL/DR is also pretty effective if they are solid players with good ratings.

I can suggest using a DL/DR. I did test several formations against 4-3N-2W-1 and it seems that when I played DML/DMR, it actually made me concede! Play a 4 man defence DL-DC-DC-DR. The rest is up to you really, I would attack the middle in this case.. Something like a 4-4-1-1 works... I guess your 4-4-2 was effective too!