well, pure counter attacking relies on short passing or retaining possession, to draw opposition forward and then clear ball to flanks and start a counter when they have commited forward. A less agressive mentality and a more structured fluidity is needed, so you want a well balanced formation that features triangles...a 4-1-2-3 DM Wide is good for a structured setup, or an asymmetric one for highly structured. That would work if you get attacked. If opponent is holding back, you should play more fluidly, which would no longer be pure counter attacking, but playing through defence, as you will be asking everyone to do more, your defenders help overload the final third, and your forwards to create chances and help defence, meaning you can change formation even to a flat one.