That's not how it works. Last year the Nino developed way late, it was pretty diffuse, and the MJO was on steroids. There were other factors- the QBO was headed in the wrong direction, the EPO, the PDO phase/strength, etc. There are always multiple factors that combine to influence the ultimate outcome (of winter).
In our region, we generally always want a Nino over a Nina. Increases the chances for -EPO/+PNA, i.e. ridging in favorable locations, encourages a more active southern stream, among other things. Exception might be a strong Nino vs. say a weak Nina, in some cases.