Come on...lets be honest here...
If I choose a medium class team like: Atlético, Sporting ( I use), Benfica ( I use), Valencia, Lazio, PSG, Lyon, Marseille, Arsenal, City, ManU, EVEN Milan, Inter, Man U,Juve.... You need to WORK A LOT to beat a medium-Brained or (half-decent) PES player using MADRID or BARZA online... WHY???
Why--->
1st: You have the button lag, that do almost impossible to do a proper tackle to stop Ronaldos, Messis, Benzimas, Kakas, Robinhos, Zlatans,Rooneys, Etoos...etc.
2nd: You can use the DEICI idea and set up a defensive strategy...like 4-5-1 or being a pressing and counterattack team...but if you do it all the time...your team is gonna be really affected in the STAMINA by the halftime...and if you have bad lock and you are 1 or 2 goals down...you are dead.
3rd: The inconsistency in the GKs, specially in the smallers teams its really noticeable...because of that, its really possible that the Barza, Madrid, Argentina or Brazil user team will score at least one goal... even from a corner...
4th: Be carefull using the press to HIGH, because if the Half-Brained player with the super team base his play in Long cross balls you are dead...and nobody its so damn bad to play all the game running with Messi or Ronaldo.
My strategy is:
-Against Madrid... Play 4-3-3 with all 4 defences defence minded, 2 CMF and 1 DMF defense minded, put a good Header CF and 2 quick good crossers Seconds Forwards...try to play really open across all the field, a la Barza... The defence in Madrid its no so good... I change attack by attack with them... Win Rate with these tactics: 60% using Benfica.
-Against Barza... Do not use any team strategy because Barza its a really good team with great midfilders like Xavi or Iniesta ( Long Rangers), a Real good defence with Puyol,Piqué,Milito, Abidal, and Touré Yaya like DMF... and of course Messi and Zlatan...just really dificult to stop... My strategy its try to stop messi with bad intensions... try to press them to go into the cutback back center to Zlatan and press against the line given a Corner...then Pray...
To attack Barzas you need to puch with everything for the Maxwell or Alves side...try to get there and center or try going with long rangers...because thr GK its average... Win Rate: Maybe 50% with Benfica.
Against Brazil or Argentina...just pick one BIG team like France, Italy, Spain...dont try them with small or medium teams like Zcech, Croatia, even Portugal...dont even think in Chile (my country) or Asian teams...its just really unfear...
IMHO the real shitty thing playing against Barzas/Madrids teams with mediums teams, its that the game become really defensive... you need to put all your forces just trying to stop they Big Players...and you can not play a balanced game... just like real life...but with really inconsistent GK...and in the other hand...there is so much diference between Barza / Madrid and teams like Sevilla, Inter, ManU,Arsenal,Atlético, Milan, Chelsea, Liverpool... that its a arcade thing...
I know madrid and barza are good teams, but...not that good...
Remember the final in the Clubs Final 2009 Barzas-Estudiantes (Argentina)...2-1 for barza in the last minute of extra time.... ( SEE THAT KONAMI???)