TotalFootballFan9 thank you for your effort in testing and sharing this tactic. Now, I feel it is my duty to share to you my experience. I played with my Everton against Chelsea. Chelsea used a 3-2-2-2-1 (5-2-3 wide) tactic, as you can see in the picture.
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I used TFF V3 tactic. First game ended 0-0, the second ended 1-1. I played both game in full time to watch how my team play. My defense was solid, but my attack was weak. Because my 3 attackers were AMCs, they never could pass by three line defenders of Chelsea. Always Chelsea had the time to retreat half of its team before my attackers enter in the box. Always they used their midfielders to come from behind and steal the ball from my AMCs. Short passes weren't good enough to unlock the Chelsea's supranumeric defense. It was very difficult for my players to reach the goal and I had 7-8 shoot in the whole match.
What I did to beat Chelsea (3-1) was to change the formation with 2 strikers (AF-At) and 1 AMC, then I changed the mentality to Overload, the team shape to Highly Structured, tempo to Higher, width to Fairly Narrow, closing down to More, Use Tighter Marking, Get Stuck In, More Direct Passing, Pass Into Space, Pump Ball Into Box, Hit Early Crosses. Also I instructed WBs to Cross From Deep and Cross Aim Centre. Of course, I remove Pass It Shorter from all the players, including CBs.
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Now, the reason for choosing a formation with 2 strikers was those two are in between enemy's Centre Backs and they will have more chance to destabilize their formation. One AMC was good to draw out the central CB. With Highly Structured shape my three attackers stood high in the pitch waiting to receive the ball and my defenders stayed home, to not be surprised by counter-attacks. Because Run At Defense, Close Down More, Get Stuck In, Use Tighter Marking my team tried hard to regain the ball and when they did, the ball was threw directly to my attackers (Pump Ball Into Box). Chelsea had no time to regroup and always they were caught only with line of 3 CBs in defense. My attackers passed the ball very quickly in future position and the shoots start pouring. My team looked very dangerous, practically they kept in a continous counter-attack.
I don't want to diminish your tactic and brag for my tweaking, I only beg you to test Overload and Highly Structured. I was inspired by this tactic LI4MS Goals Galore
http://www.fm-base.co.uk/forum/share-download-fm-18-tactics/367717-li4ms-goals-galore.html