I always play 4-4-2 attacking formation (hexagon)
but in recent games I started with this one (have 2 talented DMR)
and with my main team I play this
I do not counter opponent's formations, but I try to counter opponent's player who are threat during the game by changing tactic and swapping players who are in direct duels...
And I usually have 22 men, 'cause I'm rotating players who play average, keeping those who play 8+ in starting eleven...