Order your review items by SRS level in ascending or descending order, and each SRS level is ordered first Radical → Kanji → Vocab for faster level-up.
Script will appear in upper-right corner of review screen.
I posted this script on Greasyfork a long while ago for someone and posted the link here and there on the forums, but never made a thread for it. It’s just the code from this thread, but with a little extra ease of use added by me.
Version 3: indicator can now show Apprentice/Guru/Master/Enlightened count instead of Rad/Kan/Voc count. Both are possible as well. Formatting tested on laptop, but might be a bit stretched out on a desktop screen.
Default setting is still as it was before. Customising the configuration is possible by changing the following lines (11 & 12) as you wish (default shown here):
var indicatorRadKanVoc = true;
var indicatorPerSRSLevel = false;