Personally, I don’t mind plowing through 100 reviews at once, but I prefer to have the review load spread out evenly day-to-day.
I use the “ascending level then subject” lesson order and all lessons at once, except:
- I don’t do more than 5-10 kanji lessons in one session
- I don’t do more on-level lessons if I have 5 or more kanji that I haven’t gotten past apprentice 1
So on a good day, if I recall all of the kanji on the first review, then I can unlock everything in a few 4-hour intervals. On a bad day, if I can’t recall anything, at least I don’t have more than 5-10 new kanji to focus on. (In general I find radicals stupid and vocab easy, the big challenge is brand-new kanji.)
YMMV, of course.