it just has the special property of not referring to any other good?
Yes, I think that's my position.
This is a little surprising to me, because you seemed adamant earlier that prudence was the highest good most cardinal, chief, greatest good thing. (Sorry, it was Nate who said it was highest.)
But now I understand that you mean "[first?] in a category that also includes pleasure"! How do you reconcile these things?
Are you doing this in an effort to maintain the consistency of everything Epicurus ever said?