Haven't made it far myself, but all I can really say is expect a grind. It's going to be slow going. It's meant to be slow going. The only real way to do it (or at least Anemos, as far as I've seen), is being on during active hours and being part of the train. You'll get piles of crystals, and if timing/weather is on your side, you'll get your feathers. Exp will be ok, but you can also work on challenge log entries for that. Slow and grindy, but can be solo'd without any trouble.

Can't say as I've figured out any decent way to progress through Pagos yet, tho.