I think everyone's in the same boat. The high rank NMs were way too easy and have terrible drops so they aren't very entertaining, and the mid-rank NMs only lasted two or three days. For now I just log on a couple hours here and there and grind a little SP on a random class I don't need. I haven't touched gathering and I'm sort of keeping it in reserve as a last resort for something to do when I inevitably run out of combat class ranks.