Thank you for the extensive feedback!
Thats a good call on the contact damage, I originally added it when I was working on the first few basic enemies but now that you mention it, it might be better turned off for some. I'm not sure if that would make the game too easy as a whole, but maybe it could also shift the focus more towards the bosses attack patterns themselves, so its worth a shot.
About the spell select button, you're right! I completely forgot to add it to the options. In case it still helps you, the default is either Mouse Wheel Up or I. For the time being you can also change it in the settings/InputBindings.config file. Will update the build when I can too.
Also dual longswords sounds pretty sick ngl, might try that myself later :)