5D Individual or Social Memory Complex

[anagogy]

In 5D it is said you can choose to progress as an individual, or as a social memory complex.
Wouldn't being part of a social memory complex yield faster spiritual progression?

What's the benefit of going through 5D as an individual?

If you start life as an individual, can you choose to join a social memory complex during your life?
Or do you need to be born into the complex?

If 5D is really magic, then I can see the desire to go at it alone. I'm an introvert by nature.

I could be completely wrong, but my intuition is that it is mainly STS souls that end up going the lone ranger route.  As Ra says, there are very few 5D Orion negatives, because they no longer perceive any virtue in other selves.  So when they leave the Orion Empire, do they then join another complex?  

My feeling is no.  

They explore Selfhood the absolute max state of absorption as a powerful 5D being of darkness.