Where do you recommend artifact-hunting?

I think it's the fact that it gives a set 550k exp to every character, regardless of level, instead of a moderate amount according to your level, like these events usually do.

It does?
I am doing this on a 30-ish char, got about 8k for the first artifact and 9k for the second, which makes sense considering it leveled a few times between them. About 20% from each.