I'd be more than happy to do a more detailed review. Given you've almost got another draft, I'll wait for it to post. Referencing the rules may help some, although the special actions and rules was fairly reference friendly already.

My proposed changes are primarily dealing with the order ideas as presented or more precisely how detailed they are. A quick example is the beginning boss list of cards. Although at some point you may wish to detail them in the same way, at that point in the text it would be best to just acknowledge them, give an example or two and continue explaining the rules.

I personally have problems when I write of figuring out how explain the rules without going into too many specifics on certain elements. At the same time you don't want to be so vague as that readers have to skip forward to understand what they are currently reading, but it's easier to comprehend when ideas are separated and given their own section. Something that may help is to do text boxes to break out the detailed explanation, it just helps the reader zone in on general rules and recognize specifics. This might work for the boss list if you wish to keep it near the beginning.