Lower accuracy (75% accuracy in your case) is a sign of learning too much at once and needing to slow down and absorb what you’ve already learned. Pick up some easier reading/listening material and reinforce rather than adding more (while keeping up those reviews!)
I’m at a stage where I’m relearning a lot of Wanikani from levels 40-60 right now because I didn’t follow this advice, so I felt compelled to respond to you 
From my other post - a WK+BP Level Recommendations. I recently completed N3 studies in Bunpro and have completed WK. My last post was back in April, and after 6 months, I have reaffirmed my reflection on my own study and changed very little. An abridged version here with minor updates - check out the original for a bit more details.
Recommend WK 10 and ~100+ Katakana vocab from Bunpro N5 deck before doing pretty much any grammar. It will save you time on understanding sentences and ensure you learn your own way of doing SRS.
N5: WK 10 Complete, Avoid going past WK 30.
N4: WK 25-30 Complete, Avoid going past WK 40
N3: WK 35-40 Complete, Avoid going past WK 50/51
N2: WK 50/51 Complete, STOP WK!! Do immersion!!
“N0”: N1 is more academic and may not relate to your Japanese goals. It would be better to start a custom Bunpro deck or manually add vocab/grammar as you run into it, or just manually learn from the existing decks.
I’d recommend not even looking at WK 52+, but I know some folks have tendencies toward completion, so if you feel like it, go for it during N1 study.