Some help here for Cup's Final

[Dragonite]

I would suggest you to play 3-5-2 flat

[DrGonzo]

I would suggest you to play 3-5-2 flat

Thanks for the answer! What does it mean "flat"? Changing the AMC for a ST? Will it be a problem to put the same player that now is AMC as a ST? He only knows that position, but he's a very good player 17q, and if I have to put a ST should be a 14q.