SorryHere is a quote from sdw's guide. Hope it is helpful to you. I only use 4-5-1 V-Style against weaker teams, so my advice would not be that helpful as that of sdw.
4-5-1 V style - This is my favouriteformation.Very strong and very hard to counter it,cuz this tactic is very plastic.You can use it for defense,for normal attacking,for attacking...With strong ball possession or effective counter-attacks.The red arrows and mentality are very important.I like to put red arrows only on DL and DR,however AML and AMR.Normal mentality down both flanks with counter-attacks.Look what small difference you can change and all mentality is changed.If you clear the arrows of AML and AMR,focus the passing mixed,and use short passes you'll gain ball possession but it's possible to loose effectiveness.It's good when you keep the result.It's like "tiki-taka" Barcastyle.For this mentality it's good to have PlayMaker.If you put red arrows on your MC's and AML and AMR,change the mentality to attacking and just dominate.Never use DMC with red arrow,like a lot of forum guys are talking. I tried and many times I failed.Another counter-tactic of V style is mappleleaf.There are two interesting tactics which are mapple leaf and the best is 3-2-2-2-1-(3 DC,2 DMC,2MC,AML,AMR,1 ST).I often play with 4-5-1 V style formation and I saw a lot of problems against 4-1-3N-2 and 4-3N-1-2... Reverse logic but fact.