You could, in real life, select 10 strikers and a keeper, you'd get humped. All I'm saying is that the tactic is not logical nor realistic, and on paper it shouldn't be getting very good results at all (as in real life, it would get raped by a manager with half a brain).
10 strikers? good example. But, this tactic uses only 3 strikes. And many teams in real life run with 3 forwards and get great results. And again in terms of roles. Managers don't release their roles in real life. You cant just go to the Barcelona website, and there be a tactic page that details everything LOL. So, saying that no team uses those roles is completely baseless.