Speaking of which, below Guru, i.e. Apprentice or Not-yet-learned… I think it is always good to cheat however you want… because you haven’t properly remembered it yet.
About memorization beyond WaniKani mnemonic, because you need real life thingies, beyond level 20-30, you will also need more difficult Japanese materials as well… otherwise you may fail to remember… and also, leeches will be noticeable.
That’s why I need to learn other aspects of Japanese language too.