@sim the schedulers have gotten a bit better with anki. if you enable the new FSRS mode the repeats get spread out a bit.

someone did a bunch of machine learning crunching on records people donated and made a more accurate thing that predicts when it thinks you will forget.

nowadays i think the way to go is to use mneumonics to learn anything that doesn't really stick in naturally. and then just rely on anki as a quiz tool to prompt you to remember it.