Interesting concept, even if the design currently have limitations. I can really see that you had a lot of idea and it's also easy to see this game expanded with more fighters or type of action (like elemental). It feels like an auto-battler but with a puzzle twist. I think the game could be more accessible if you started with smaller sequence of actions (human short term memory can only remember 7 things at the same time).
Also, one retry I had the boss spamming attack and shield only and it felt like impossible to win x')