PvE with a mix of Factions/Nightfall Professions

I intend to make a Ritualist/Paragon (Rt/P) once I get Nightfall. Since I don't have it yet, I can't really test how I would go about making one in PvE.

After reading GuildWiki, it seems like the Nightfall tutorial ignores Factions primaries and Factions' tutorial ignores Nightfall secondaries...So just how would I make a Role-Playing Rt/P?

Edit: Thanks a lot, Kook. Good to know!

You'll have to make a Rit/x in factions and then play through factions until you're closer to the stars and can change your secondary. Then, you'll have to get yourself through Nightfall campaign until you get to the Sunspear Santcuary - not far in at all for characters coming over from factions or Prophecies then you'll be able to take the pAragon as your secondary.