For 4-5-1V you need really good players at AML and AMR, the principle being that they take advantage of the narrow formations that 4-5-1V is the normal counter for, taking the ball wide towards the base line and then crossing for the ST and any other players from midfield that have kept up with them to get the ball into the net.
My 1st team has made a career of using 4-5-1V as their usual formation, I don't use any arrows except reds (forward) on the AML/AMR. Usual orders are Normal/Counter/Flanks/Short/Low, except when playing stronger teams, when Defensive/Longball is the order of the day. If I'm at the match and the opposition is weaker, then I'll go to Attack/No Counter and possibly add High/Offside if the opposition doesn't have long shooting specialists.