I do Wanikani and Bunpro as well, and my third “study” is just immersion with something I find fun and engaging. This is usually watching anime with Japanese subtitles, and looking up vocab/grammar points as I encounter them. I don’t really try to go too deep in research or memorize anything. I’m just focusing on understanding each sentence and moving onto the next one, trying to get exposed to as much of the language as possible. If something is too hard I just move on.
I did try adding other decks or study resources like Genki or Lingodeer, or some other Anki deck, but it was making me burn out since I was just studying all the time and not really getting any practical time with the language. Currently WK + Bunpro are my priorities, but as I progress in them I can see myself spending more and more time with immersion until eventually that’s all I will be doing. And that’s partly the reason I wanted to learn Japanese in the first place 