I was not around during VoA expansion. When I returned, I ran through all VoA quests, missions, challengers, and some raids. I'm still working on to complete VoA raids one day. (Missing pillars, temple, windsong, and all sepulcher of order raids) My favorite part is Introduction to Argath. It takes you to the entrance and then you can navigate through top floor to look for spells, quests, and missions there. When it's time to fight, you go downstairs and start your adventure there. I felt that it was nice introduction.