From the table on Page 1 in the pinned Counter-Formations thread at the top of this forum:
Formation 4-4-2 - Counter Formations 3N-4-1-2, 4-5-1 V-Style, 3N-2-2-2-1 Butterfly.
Narrow Diamond is not one of the recommended counters, but if you are having success with it, that's OK for you, you may have the players to pull it off.
Personally, I use 4-5-1V against 4-4-2 Classic, but that's because I have AML/AMR players that on a good day, tear apart any formation they come up against, but I wouldn't recommend using 4-5-1V against a formation which has been found to be unsuited to it, in the way you are recommending ND against Classic.
@ Jackers, one of the issues I can see with your orders is that you are using long passing with offensive. With attacking I would use mixed passing. The only arrows I use are reds on the AML/AMR. The blues on your MCs and reds on DL/DR are pulling the players out of the positions they should be in to match your opponents formation. In general, I've found that any red arrows on defensive players are not helpful.
Given your match situation and what is needed in the second leg, I would get rid of the arrows except those on the AML/AMR, go defensive, flanks, long passing, half-pitch, zonal and switch on counter attacking - but that's me and what I would do - you need to decide whether that is good advice for you in your situation.