If you are much stronger, it shouldnt matter 9 times out of 10 which formation you choose, you should go with your strongest.

BUT

Why risk the wrath of the NGE? If you can counter the opponent with a strong formation that logically should work, then why not do it? You are only giving yourself an advantage.

I am very distrustful of known counters now and tend to use a logical approach. If he has an AMC, use a DMC in your formation. If he has only one ST, go with 3DC at the back or 3W defenders, if he has 4 in the midfield, put 5 of your own....it just takes you a few minutes and you should have a team formation set to take advantage of his weaknesses.

Of course, if you are stacked full of scouts, again, just go with your strongest formation and let others counter you, if you have that luxury.