Personally, I’m a big fan of the 14 lessons a day plan. Set your lesson batch size to 7 in your settings, do two batches of lessons a day (preferably at different times), and catch up on reviews each time. Manageable workload and accomplishes a little more than two levels a month. Honestly, going much faster than that only makes sense if you either
A) already are fluent in Japanese but don’t know kanji
B) want to learn all your kanji before you start learning grammar and starting to read (You can totally start reading way early and just deal with ambiguity for some words and kanji. I’ve learned many kanji just from reading them repeatedly as well)
C) You have more than four hours a day to study Japanese to adequately balance your ridiculous kanji pace with other disciplines such as listening, reading, and associated grammar study.
[Edit] I also feel like noting that I think B is a really bad idea that will make everything you learn on WaniKani fall out the other end