Word of advice: as the time passes the number of review increases, as you know. But we tend to minimize the impact in the future. What you do today will come back in 1 week, than 2 weeks, 1 month and then 4 month.
In 6 month, the result will be today + 1 week + 2 week + 1 month. On top of that day.
If the charge is too large, it will takes weeks to decrease.
If you’re already at 400/day at level 8, beware of the burn out.