His defense is very weak.He has no wingbacks,so any formation with attack from the flanks with AML/AMR will help you.It's your choise.4-5-1 V style is perfect for counter.
agree, not sure 451V is wise though.. he is having 5 attackers in his half, sure the answer can't be 5x5 ... but again you can have 3X3 in the opposite half .. so it will be a match full of goals