I'm not quite sure if you'll have rear camber issues since I didn't go that route. Palmerwmd did go the Armada springs route months ago and I think he didn't run into any rear camber issues. I'll let him chime in to confirm though.
If you want level, I wouldn't even raise the rear as there's already a rake with the front being lower. You can possibly get away with a 2" lift in the front only. You'll most likely need aftermarket UCAs to clear CBC though.