Book of Scale turn in?
 

I am at the point in my paladin epic where I need a Book of Scale. I have a guildie with the frost book and I am purchasing a burnt book MQ. As per the wiki about the turn in:

"note: You must have a Guise of the Deceiver to do this yourself before the qeynos NPC, or have an evil friend loot the books for you and do the hand in. Even with a guise, you must work on your faction, easily done with the famous red wine quest. "

Is the faction necessary? This guy is just a merchant and both players have a DE mask to use. I can't find any more info about this, on the wiki or on alla's. I'm spending ever dime I've saved for the MQ and since the staff no longer supports MQ'ing, I really need to make sure this goes well.