1- About the offside trap : I'm personally use this option if I'm playing normal or defensive or hard defensive mentality, other wise i don't ... but It doesn't mean this the right standard and you know the game randomization .
The offside trap suppose to work great with the attacking mentality but what? I don't find it useful ever when i use it while playing attacking/hard attacking ... but works good and can feel it's effect in normal/defensive. (this phrase will be added to this thread so as to be clear from nowand don't be so sad )
I'm always prefer and as i said before (all this what said/mentioned here or any thread or comment from me is generated from my experience with the game engine in 13 months so you may find some wired information doesn't correspond to the default standard) so I said in my comment in page 2 use offside trap while using attacking mentality and i said that because 4 4 2 classic formation not an attacking formation and has two strikers who doesn't have any support from the back (AMR/C/L) so it's easy for your defense to trap them .
and generally using offside trap depends on the existence of AMR/C/L in the match ground or not, if not then use it safely but if there are any AMR/C/L then don't ever use offside trap regardless of using defensive/normal or attacking.
2- I suppose always you are an active manager and watch your games so when you play and see your opponent's possession near yours or more then be sure he is using whole pitch ... if you saw that his attacks twards your side is much more than you then you will feel that(your are a professional manager and know where the game going to).
3- I didn't mentioned when your opponent weak or strong, I said specifications to use short,long or mixed passing so read again (this doesn't require from you using against weak or strong it doesn't matter)
Using AMR/C/L don't require/force you play down both flanks, but depending on the weak points for you opponent if has no wingers or DR/L then fell free to use AMR/C/L and ... but you can use down both flanks against any formation but if it doesn't work to break the opponent defense then you depriving yourself from using the mixed passing focus and use all possible methods beside the down both flanks.
I hope I could answer you questions in the right way ... and i hope all of this is adequate![]()