Although I haven't used Anki for math, it seems to me like I want to build up concepts and competencies, not remember definitions. Like, I couldn't write down the definition of absolute continuity, but if I got back in the zone and refreshed myself, I'd have all of my analysis skills intact.
I suppose definitions might be a useful scaffolding?
In light of reading Hazard's Shortform Feed -- which I really enjoy -- based on Raemon's Shortform feed, I'm making my own. There be thoughts here. Hopefully, this will also get me posting more.