All Formations can be used as attacking, it depends on your opponent and your team.

I usually use only formations with winger (AML/AMR or ML/MR), because I have pretty good ones.

I also use mostly 4-5-1V and variations, I don't play same tactics every game.

F.E. I use 4-5-1V against 4-0-3n-1-2, defensive-both flanks-long-on at beginning, if it doesn't work, I change something.
I use 4-5-1V vs 4-4-2 classic, mostly: offensive-trough the middel-short-off at the beginning. If it doesn't work, I also change.

BUT I also check my opponent, try the find his weakness. At first example, if opponent has 3 strong MC, I start playing 3n-1-3n-3w-1. At second example, if opponent has weak DL/DR, I'll go down (both) flanks.