I’m going to suggest this is a losing game (if the goal is bringing the reviews back down to zero and using the SRS like it’s intended.) Your accuracy is not high enough and the re-reviews of failures aren’t prompt enough for it to work. Your most-frequent review intervals can’t work for your worst items, because there is no way for you to see that 4-hour review in the next 4 hours or even the 24 hour review in 24 hours, with thousands of other items in the way.
You could try jump-starting back to a level playing field by temporarily defeating the SRS, brute force learning all the items in short-term memory, getting the reviews done, then restarting the SRS method.
Unfortunately, I don’t think even that is going to work at an hour a day. You need to bring the pile to zero before you forget everything again, and that means you need to get it all done within a day or two. It probably means setting aside a big chunk of time for that (and then again when the waves come back, but they get smaller and smaller)