I use this tactic 4-2-3-1 sometimes.I disagree with Raz for that,DL/DR are useless.They are very useful for attacking.With red arrows and attacking from the flanks they dominate with AML/AMC/AMR...My MC's are with blue arrows to fill the holes in the middle pitch.So if this guy is using the same mentality,if you attack him from the middle,he will stop your attack and beat you very bad.I agree with you about 4-5-1 V style.