Gang I’m concerned.
Technically Unholy gives more options that we can use as trinkets.
BUT the prospect of having a 678 tome of lights devotion is also one I thirst for.
Blood brothers and sisters what will you be setting as your loot spec for the first vault?
Unholy. Hero Track Tome is farmable.
No reason to gimp your vault out of really good raid/key trinkets on the off chance you get the ONLY Tank item we want from either source.
Thank you Clarize. 
I was mulling it over because so many of the tank trinkets are rather quite bad.
I’ve been using a 593 beer mug (tank only) from Cinderbrew Meadery this season over anything else. Before the season started you were able to run Cinderbrew on heroic, but then they made that not possible. It’s always done 10% of my healing lol. I’ve been looking forward to getting one at proper ilevel next season.
That being said, it is farmable since it’s an m+ trinket, and I haven’t looked into any raid trinkets I might want.