There is no successful tactic 100% ,there is good team and suitable/reasonable tactic for that team quality, but mostly against stronger teams than me i always play defending and it worked well for me so far ,and vs weaker teams i play attacking mostly with the same formation ,it works like 80 % i could never win 100 % in all competitions, i did it once in season 2 but that was season two,after season 20 it's complicated .