"Embrace of the Twisting Nether" is showing the wrong stats in the spreadsheet. (
Thottbot World of Warcraft: Embrace of the Twisting Nether) Apparently this has been changed somewhat recently to have increased AP, the spreadsheet shows 58 AP, but it is actually now 84 AP.
(Glad they changed that, always annoyed me that an "upgrade" requiring 2 nether vortex to craft was actually a downgrade)