Editing Age of Sigmar/Tactics/Death/Ossiarch Bonereapers (section)

=== Feast of Bones upgrades ===

If you started with the Feast of Bones kit, there are several ways to build the army. The first is the (maybe subjectively) best, which is to go with the Rule of Cool - buy the cool models. Run 3x10 Mortek Guard to get Battleline out of the way, and then take advantage of how cool Morghasts are to scare your opponents. 

Starting with Vokmortian, 10x Mortek Guard, 3x Necopolis Stalkers, and 2x Morghasts, and the Vokmortian's Retinue battalion, you can instead use the Dread Retinue Battalion, to use Morghast Harbingers instead of Archai. Or, get a second unit of Stalkers and create the objectively coolest battalion, the Katakrosian Deathglaive. Add in some more guard or Kavalos Deathriders, and whatever else you want that you like. That's it. It's the rule of cool. With Morghasts - the coolest rule of cool unit.

The other way is to move to a more competitive list, but sadly, the Feast of Bones units aren't great. Vokmortian is pretty bad, as are Morghasts, relative to what is offered in the army, although they can be used as a tool. You can run Vokmortian as a Boneshaper, especially if you figure out a cool conversion for it. Then, add in a Soulmason and another support HQ or Liege, and a lot of Mortek Guard. Add in a few Gothizzar Harvesters and/or Crawlers, and you have the fundamentals to a competitive list.