Ok, it may be a little awkward from my part to ask this at this point, but still...

A lot has been discussed about Area 1-3 as a good place to stay for a quite long time until you get at a certain point. But I've been sitting at stage 3-3 for quite some time (random reasons got me there instead of 1-3), and I'm not sure if I should stay or advance through story mode.
I still can complete daily missions with the amount of rolls I can get at 3-3, but I've just reached lvl 44 and I'm starting to wonder if I should advance.
I have all my N girls maxed, but I still have a couple of R girls waiting to be maxed. Should I stay here at stage 3-3?

Thanks