Thanks, planned to polish a lot more on the last few days but I ended up having to put together UI and barely scrape by with what I had.
I also wanted to have 3 bosses with a modifier system- but that was cut during the process of figuring out how I was going to get the current boss to (barely) work... I think there's a softlock in there somewhere.
I'm working on rewriting the boss classes so I can make changes between all future bosses without unnecessary copy-pasting everywhere.