Level 50
Rotate through your combos and smash that Midare button. Use Meikyo for Gekko and Kasha past the opener. Refresh Higanbana as close to 0 as possible.
Level 52
Introduces Kenki Gauge and Hissatsu: Shinten. Use it when you want and be sure not to overcap.
Level 60
Once you begin accruing Kenki to spend on Shinten, the opener should look like this.
Level 62
Introduces Kenki gain to all of your combos, mash that Shinten button harder to prevent overcapping.
Level 68
When first introduced Hagakure is only really used in dungeons to try and clean up leftover Sen, it does not see a real rotational use until levels 76 through 78 with the introduction of Tsubame-gaeshi and the reduction of your GCD.
Level 70
By level 70 your opener should be utilizing your new skills you’ve picked up along the way and look similar to this, still getting buffs up early and following up with a quick Higanbana.
Level 76
Use exclusively after Midare Setsugekka or Tenka Goken, never after Higanbana. Begin learning about filler in order to keep your rotation lined up. An infographic with a quick primer on filler can be found in the basic guide.
Level 80
The opener should feel familiar by this point! At level 80 we are simply adding skills we have learned or replacing skills with their more powerful versions. You should be set to use this single-target opener and the basics of play (keep Higanbana up, don’t drop buffs, push your cooldowns) until you reach level 90 and can utilize the basic guide.