GEFS currently has the MJO forcing moving briefly into phase 2, then into the COD by early Dec. Who knows what happens beyond that. Looks like it may do a loop in the COD, but it could reemerge in a favorable phase or stay neutral. If early Dec is going to be on the mild side, I am not sure the MJO state will be a primary reason. As for the Nino correlation, well we don't really have Nino conditions currently. Do we typically have warmish Decembers when ENSO is warm-neutral?