A PCT that works just means you feel OK, don't get gyno and don't lose all your gains. You don't want a PCT that just works, you want one that recovers your testosterone as quickly as possible so that you retain more gains... In this regard you do not want a PCT that is merely sufficient but one that is "overkill."
All my PCTs are clomid-based. In my experience clomid is the ****, makes nolva PCTs look like crap, and should be the primary component in every PCT.