well..i played 3 DC since season 2... and in this season, so far ~ goal 77 and 19 conceded. i think the DC need to be strong if only having 3 men in defense line and your front man need to be to maintain high possession (well..still maintain high possession won't lead you to win...but you have a better chance) so... in 3 men defense line... i would say not using offside trap, cause that is a big risk. they can use long ball to attack and easily broke you defense line if you are playing offside trap. and i would use a DMC blocking in the middle so the ball will go to two sides... at least better then directly go to the heart and buy times for MC come to defense~ i used 3DC, 1DMC, 2 MC, AML,AMR,AMC, ST for 1 some time i will put 3MC and take out the AMC for more men to defense.

this is my 7 season, and i won 6 league title, 4 CL title and 1 CUP title (season 4 Level 7, 1st place) (i usually gave up CUP...i am always against the higher LV, stronger team and i am lazy to try to low team quality in the end of the season to get a "easier CUP"...so...like right now in the 1/8 CUP...i am the only LV 7 in the CUP....all are at least LV 8,9 and have a LV11) -.-