Gabriel-
How many threshold settings are there and how many headlines on a page?
The threshold setting only exists for logged in users.
Even if you restricted the options to 'on' and 'off', it would be > 100 purge requests
How is sending a hundred URLs - perhaps 5000 bytes - to the Squid on page saves a problem?
Separate pages on the other hand will only purge the (shorter) page that's actually edited and the page they're linked to if they are deleted/added.
Separate pages are not a good solution for this particular problem, see my responses to Brion.
Regards,
Erik