Well, I downloaded fm13 to see who roams there. I made a very rigid, contain tactic, and roles creator created were default, but more advanced wingers and AMC were set to roam. I'm not sure if this is a bug, or they are supposed to roam no matter what you choose to add unpredictability in attack?
Anyway, I just tried to create a possession tactic. I was thinking how I dont want to use BPD's as they initiate counter attacks, so very fluid was out of question, then I thought how I don't want to use a sweeper keeper as he also initiates counter attacks, so fluid was no longer an option, and how I don't want to use limited defenders as I want to play out of defence, so structured and very structured were out too, which left me with flexible. Team mentality shouldn't be agressive as I don't want players ahead of ball, but it also shouldn't be less agressive, as I don't want direct passess from my defenders, so that left me with standard, which should fit flexible perfectly, and is also the primary mentality of tiki taka. So, I've picked shorter passing and retain possession, to keep a high pass completion, as well as well as much lower tempo for the same reason, I've picked work ball into box and didn't pick pass into space to allow slower buildup, and play out of defence to discourage my defenders from clearing the ball long. That also meant I needed to push defensive line as high as possible, to keep them closer to midfield since their passing range is at minimum, and now I was left with just narrower or wider. Wider would perhaps allow easier goalscoring, but narrower would help us keep possession and regain possession easier, and pressing easier, so I've picked narrower. We should be suffocating space playing like this, and since it might look difficult to score like this it really isnt, as all passess are very simple, and flexible team shape allows for enough movement, and we take our time building up attack and creating that ccc. We wont create many lousy opportunites, we will create fewer, but better chances. I've picked an assymetric formation formation, and used roles and duties suggested in this thread, but I think it could work with a few other formations aswell. If anyone wants to try it, be my guest. Oh, it seems I shouldn't be closing down if I play like this. We are compact so range of closing down doesn't need to be great. It ocurred to me barcelona only presses for 6 seconds, and then goes to stand off, and I think this is it.