Speed vs. Readability: Choosing Kanji or Kana in Fast Writing

I've been thinking about the trade-off between writing speed and legibility. While simple verbs like 行く are second nature, I struggle with whether to use kanji for formal terms like 請求 or 購買 when I'm in a rush. Writing in kana is faster, but I find it disrupts the visual flow when I review my notes later. Does anyone else feel that complex kanji actually help with faster scanning despite the stroke count?