/jp/ - Otaku Culture

So I'm going through はなひらっ！for the first time and for the most part I'm able to follow the dialogue/vocabulary pretty well so far. There's been a couple of phrases (like 一筋縄では行かない) that I haven't seen before though, should I add those to a 'mining deck' or can I expect to see most of these common ones later on in my Anki Core2k/6k deck?

I just started a while ago so apparently I've only gone through about ~650 cards in the deck so far.