Simple Instructions is a document in The Forgotten Sanctum.
I will keep this terse in case my imps should meet an unfortunate end and this missive is intercepted.
By now you will have encountered other members of the Circle and laboriously scrutinized their motivations in breaching Wael's obscured sanctum. Allow me to add my rationale to theirs.
My desire is a simple one - tidiness. There is already one god blustering his way through the Deadfire, and I have no desire to see him joined by another.
If Fassina still lives, try and keep her alive. She has a modicum of potential, and it may yet aid you in Wael's unusual territory.