LF LOG Help [MM Hunter] - Raid H - (Gally battle)

[green ridge]

I'm only doing 38% Parse dmg in the Gallywix battle. I've been trying to improve for a few weeks, but this is the best I can do. =/
What are my main rotation mistakes?

38% parse
https://br.warcraftlogs.com/reports/QP2tyCBdwLrakf7z?fight=13&type=summary&source=18

29% parse
https://br.warcraftlogs.com/reports/QP2tyCBdwLrakf7z?fight=12&type=damage-done&source=18

[slender venture]

Rather than look at wipes, I'm going to refer to an earlier ST fight. Cauldron heroic last week.