You might also try to reduce your leech count. Check how many you have with Wanikani Dashboard SRS and Leech Breakdown. They could be significantly contributing to your daily reviews. If they are, you can drill them with Wanikani Self-Study Quiz, also using Wanikani Open Framework Additional Filters. I find it useful to drill Apprentice through Guru leeches with a Time Until Review of 75% - you can play with this setting to whatever gives you a drilling queue that is reasonable. That way the SRS isn’t interefered with too much, but still giving you a way to do extra study.
You can calculate roughly how much of a drain your leeches are on your daily reviews with:
Approx extra daily reviews from leeches = (Apprentice leeches) + (Guru1 leeches)/7 + (Guru2 leeches)/14
I’ve been able to significantly reduce my leech count over a period of several months with a daily 15 minute review of my leeches. That more than counters the time drain the leeches would have otherwise.
Edit: you Leebo’d me, seanblue