We made an interesting discovery yesterday.
A few days ago when i did a solo run through Idris to get the quest out of the way, the dungeon chest let me choose a tier 1 armor.
So yesterday we decided to investigate it FOR SCIENCE!
Urist McFappy did Idris, my Cleric did Cock Tower and after that ekl and me did Idris again.
The result: my Cleric now has two pieces of tier 1 armor, Ekl got only a blue piece and i don't know what Katz got. He did seem surprised though.
Delve time is not a factor, i got one piece during and one after it.
Questshuns:
a) I had a quest open both times, if Katz, who didn't have it, got the armor as well, this questshun is already answered.
b) IIRC the dungeons scale if you go in with a full group instead of just 1-4 people. It would be very craptic if they didn't test it for less than a full group. Who runs a low level dungeon solo anyway?
Suggestshuns:
We could take a full group and enter Dread Vault through the front door. If nobody gets a purple item, we rerun the dungeon with only 4 people to see if it changes.
Considering that an OP char like Katz's GWF can do Idris in 15 min, this would be a quick way to gear toons up during delve.