Above pictures showcase my formation, roles and team instructions. My main idea comes from Sir Alex Ferguson's 4-4-2 system.
For the mentality, I use counter with high tempo, normal defensive line and highly structure team shape to maintain team's defending and transform the defensive to attacking phase. My wingers have good attributes, players such as Diego Perotti, Stephan El Shaarawy, Bruno Peres, and newcomer Domenico Berardi. They provide more creativity and threat in flanks when attacking. Also my WB and FB will overlap to support these players in the flanks as they tend to drift inside.
Let's look at the roles.
I use Alisson as sweeper keeper support as this role will provide better counter-attack than normal goalkeeper, but not too high as sweeper keeper attack.
From left to right defenders: on the left, I use wingback support as this role will take a responsibility in covering the area left behind by the inside forward above combined with the overlap instruction, he'll look for overlapping and make a byline cross to the front whenever the opportunity arises.
My 2 centre backs will be assigned as ball playing defender and normal central defender as the BPD will try to make a pass more than just clearing the ball which is not wasting the opportunity for countering.
My right fullback. I use fullback support as my right midfielder is both winger and inverted winger. If you change him into inside forward, right defender can be changed into wingback role.
In the midfield, I use deep-lying playmaker to control the game, switch the ball to the other flank, make a long pass or even take a long shot. His partner mainly is box to box midfielder as this type of midfield will be running all over the pitch, trying to find a space for DLP midfielder, help with defending, and move into the channels to create more chances of goal scoring. On the right, this can be any role ranging from winger attack, inverted winger attack, wide midfielder, or even move a little further to be inside forward. For me, I use inverted winger as he contributes more in the defensive phase of my tactic.
Up front, I use my striker in Trequartista role which is the most important role of my tactic. This guy will be the main outlet of counter attack as he will stay in front and try to exploit the space while the opponent is attacking. He'll receive the ball and try to create a chance for himself or even run wide waiting for support before crossing inside. With the support of inside forward, he will drift inside while my trequartista drifting wide. Lastly, my deep lying forward with support role; this guy will come deep to link the attack and the midfield and he will also arrive late to score alongside my right winger.
Results with 4-4-2 Avante
These are my results for my second season as my first season is the season during which I created this tactic. During the match or before the match, I might change the tactic into 4-1-2-3, 4-2-3-1 due to the gameplay but mainly, I started with this tactic. Just for my final UCL match, my lads created a lot of opportunities, but had bad luck of conceding 3 penalties. However, we managed to score 3 times on the counter, winning 3-1 against Bayern Munchen.
If you look for a tactic that has a structured defensive phase with a fast transformation into attacking phase, and if you don't like wasting time in possession, this tactic is suitable for you.