It’s also worth noting that you only need “consistently high review accuracy” on the current level kanji and radical reviews. You can easily speedrun WK with under 30% review accuracy if you’re getting 100% on the ones that matter for advancement. I wouldn’t recommend this, since it will make you miserable, but it’s certainly possible (I did it myself in my first year of Japanese).
All you need to do to advance on WK is to get the current-level kanji reviews right four times at specific time intervals over three days. You don’t have to understand them and you can forget them after three days and still keep speedrunning.