Bro, when I use this formation, normally I start with attacking 1st..As U mentioned in above..this is attacking formation..so U should start with attacking 1st...then see the condition..if the opponent's possesion balancing with you (means he is also play attacking for sure)..let's say 50-50 or more or less 47-53 or somewhere nearby then U adjust it to Normal..you will gain back your possesion..trust me...after that maybe in the 2nd half U can play attack again because the opponent sure lost a lot of energy..so that's the time your player has alot of chance to score...usually if i got the lead about 2 goals I will remove AMC back to middle MC pos to protect the score and stronger in defend...Not means u cant score more..even it is more safe and u still can score big later...
And in the case you are losing, U can easily move up your AMC as another striker or sub him with the real strker and change the formation to attacking with 3STs but this time U need to change to Long pass..not short pass..
Yes..sometimes when u play attacking and hard tackle, the opponent easily to get the freekicks so the MUST for you is u have a good defenders too..as u see, my squad I have 2 7* defenders and the others also 6*++ so if you are play this formation..your squad must be EXCELENT in Defenders/DMC/AMC and Centre Midfields...the left and right wing is so so and the striker GOOD is enough (ofcoz if u have excelent strikers then nothing can say more..hahhaha)...
That's my experience in playing this formation..have a nice day, Bros!!!!