Oh man the Vault it's very confusing. Me and 3 of my friends joined 3 others last night to take on the vault, took about 20mins to open the door, picked up my 2 Ascendant shards. Jumped all the way down protected the towers and killed waves apon waves of fallen got my 3 Ascendant Energy. Now we're on the protecting the Relic and killing the Templer with it. All this took about 2hrs. We Will only put a few more hrs into it tonight, because all the time you're in the vault you DON'T gain any weapon/armour/ability xp none. 1 good thing I will spawn in the vault next to Relic and I'll be able to invite any of my friends to join me.