Any given class icon has certain capabilities associated with it. Most players see them that way, and insisting that they shouldn't is like asking water to not be wet. Personally, I don't care how you build your toon; I only ask that if you are unable/unwilling to do something represented by your class icon, have the courtesy to say so up front instead of being a deceitful, selfish, self-righteous drama queen spouting, "Well, you shouldn't have assumed."
Because really, that is all that combination is about.
Create a toon that cannot perform one or more associated class activities.
Keep that limitation a secret until someone asks you to perform such activity in quest.
When confronted with incredulity, reply with some asinine ASS-U-ME comment.
Come to forum and decry the bigotry and enslavement of your poor, victimized class.
Keep stirring for a lovely pot of DRAMA.
I know this doesn't apply to everyone. This doesn't even apply to most, but for the one(s) it does apply to, I see what you are doing. I am thankful for the forum entertainment.
I am also thankful that I have never met you in party.
(and yes, I know I am contributing to the playacting in this thread)