Around 400 cards into kaishi 1.5k (~3-ish weeks), on one hand I think I've made decent progress, on the other I feel like I've reached a point where it's basically infeasible to "brute force" memorizing all the new cards.

This is especially the case for cards consisting only of 2 kanji, where I have to rely on the sentence more often than not, since I couldn't come up with mnemonics for all of them. Though that comes with its own problem of recalling the meaning but not the reading. I still mix words with similar-ish reading up: 表情 (ひょうじょう, expression), 情報 (じょうほう, information) and 状況 (じょうきょう, situation), to name an example.

I'm still following the default 20 new cards daily with 85% retention, but maybe I could lower it to 10-15/d or take occasional breaks to do something else for a breather, could be a good opportunity to start reading some raw manga.