I've been using basically one tactic in my LLM save on fm19 for over 18 seasons, it works fine but nothing special - strikers don't score much, for example. Haven't tried it in fm20 myself

Uploading here just to see how (possibly poorly) it stacks up against others in "Tactic Testing".

Differences between versions are Complete Forward/Pressing Forward, Mezzala/CM-A, B2B/Carrilero and IF-A/AP-A