You also need Reorder script in order to get new radicals as soon as you leveled up [Userscript]: Reorder Ultimate 2 [newest]
Also probably want to read this thread for more in-depth explanation My Journey of 368 days (+ The Ultimate Guide for WK 📖 )
I’m always on 7 days per level and never encounter reviews during midnight. If you do your lesson on 7/8 AM and 5/6 PM and follow the 4 hours and 8 hours schedule, you will be fine.