I'm having a hard time setting up the whitelist for my org because the control panel keeps throttling my edits: I get error "Unusual activity detected from this IP. Please try again after some time."

It all started with confusing UI and errors when trying to add too many domains at a time.  Now I think I have dupes (although I don't entirely trust the paging display (1-25, 26-50) and it throttles me even to look at pages so I can't get very far) but I can't delete many before I get throttled.

What's the solution to edit my whitelist in a reasonable amount of time?  It will take days or weeks if my limited free time is throttled.

P.S. I want to set this up for the org, not per-user, so using Contacts to populate the whitelist won't work unless that can be promoted to the org level.