What I've learned through my mass making of composites the past few years is the analog approach just isn't going to work anymore. The more and more I looked into things, the clearer it became there was a tremendous shift in the influences of ENSO on the global regime. So I've decided to start from scratch with composites.
It's also become clear the traditional ONI may not be the best method for defining ENSO anymore, the RONI seems to be a better fit, however, I am also closely beginning to look into the SOI and then want to look into the MEI.
I had previous constructed composites and breaking down ENSO into strength based on the ENS-ONI and ONI then I had started to incorporate the RONI, however, it started to become clear that oceanic aspect alone may not be enough to define strength (thus the importance of SOI/MEI).