Still not at level 60 myself, so take this with a grain of salt, but I came to WK after many years of studying Japanese in classroom settings (High School, College, self-study and night classes after) because nothing else I tried to learn Kanji really stuck.
And I find that while WK is really great for drilling in new kanji, it also contains a lot of kanji (and, even more so, a lot of vocab words) that I already know and feel confident reading.
I don’t really mind this usually, as I’m usually okay taking the slow road with WK lessons and reviews and having some things I already know in there is fine and sometimes even makes me feel better.
But lately I have been trying to study for the JLPT and it’s annoying to have to go through again all the ones I already know.
So, with that in mind, I am currently using the following 2 scripts to help with that:
- WaniKani Item Filter to mark items I already know and (as long as I use the same computer for reviews) skip that item when reviewing
- WK lesson cherry-picker to cherry-pick vocabulary items to learn from vocab pages
That said, if you’re already level 60, probably just the first script above plus selectively unburning items you feel really shaky on is best, provided you don’t want to switch to a different platform / way of studying as others have suggested.