Hello heteros

What boards should be archived by default with my new textboard scraper?

I'm already planing to do SAOVQ and 4-ch. Figured out Emanon and Kareha.

Also should I ignore "poster IDs" that some textboards have? Should I preserve "mailto" content (eg sage)?

What is your goal?
If you want to make a backup you'll have to get everything.
If you just want to query all dubs in a convenient format you just need the posts and numbers.