Not so sure on that one actually.
I mean after all the respective Rit and Sin bosses will remain in the game no matter if you got the second campaign or not.
Which makes their skills cappable.
Which logically means that you'll be able to change your secondary to those professions.
Just my pov, might be wrong.
YOu are wrong..capping means you need to have a secondary or primary of that class..You go and cap a sin boss as a mes/necro and you get what in box.......nothing..You need to have the campaign..