Auto-entrepreneur categories for writing and editing work?

My work has evolved since I became an auto-entrepreneur. I work as a web editor / producer for several websites and currently have this as my only auto-entrepreneur category.

1. I occasionally also now write for other publications based outside of France. Magazines, mostly, but also corporate writing projects. Is it OK to include these jobs under my web editor category as loosely it all involves editing / writing, or should I add another auto-entrepreneur category? If so, which one?
2. I occasionally sell web advertising for websites I work for. How should I differentiate this from my writing / editing work?
3. I am currently under the auto-entrepreneur earnings threshold. What options are there for if I break the 32,000 euro limit? Reel Simplifie doesn’t seem to make any sense unless I make over 60,000 euros to 65,000 euros as I’d be working more for essentially the same income after taxes and charges. What option would cover the 32,00 euros to 40,000 euros bracket?
4. Elsewhere on the site you cover off the pigiste system. What advantages are there of using this?

I was advised to look into agessa.fr for some of the writing work, but (coupled with the option of using pigiste) it seems to become complicated when I start siphoning off bits of work to different systems. Your advice would be appreciated.