Finished season with 81 GF and 14 GA conceding 6 of them when I tried new formations, one of which was illegal (why is 3-1-3-3 narrow illegal???)
I have always played defensive formations in managing games with counter attacks and it often works but I do sometimes go on the offense when I play a very weak team just to get my goal difference up usually just changing the DMC to either ST or AMC.