No one in particular wrote:
Or should I finish collecting in-story explanations for how magic booping works first?
Personally I think the way that magic works is the most fascinating mystery of Erfworld. It seems so regular, so organized and systematic with its axes and grid. I'm sure there must be rules which could be used to extrapolate things about Erfworld magic that we haven't yet seen, if only we can figure out what those rules are. The collection of magic quotes is a wonderful resource in the challenge of trying to discover the secrets of Erfworld magic.
Aside from that, a listing of each character's every appearance would be useful, but something smaller that the wiki needs even more is citations for all of the wiki's facts. If you are going to be reading through the comic and editing the wiki, perhaps you could make note of all the places where various things are proven about Erfworld and add them as citations on the relevant pages. Not everything that is represented in the wiki is necessarily true, and when doubts arise it can be a difficult task to find proof because so many pages have no citations to back up the facts.