What is a point to mark followers as essential whilst you have a quest 'Boethiahs Calling' that you have to slay your follower for Beothiah take over the slain. The npc that I want to slay dose nothing after I order the npc to touch 'Pillar of Sacrifice'. I have to look at youtube (dated 07-07-12) to find out how to over come it. It looks like a vanilla bug by the date. This is for pc only and I done this: console-setessential 'NPC baseID' 0. I done is: setessential 0001990f 0 and it worked. That base ID I typed is for a certain npc only. Anyway its done now.

Should've used Cosnach.

Hire a mercenary like the one in the Bee and Barb in Riften.

Or the merc in Whiterun. Too late now.

Either way for future reference, if you are going to sacrifice someone make sure its someone that doesn't have a quest attached to them or just hire a mercenary.

I done her quest first. Then I done another after that which is not related to her. When I done that quest I got her for this quest.