The primalist and untouchable rager archetypes affect the same class feature but they affect different parts of the class feature so they should be able to both be taken.
The primalist archetype is not counting the bloodrager's levels as levels in barbarian which is blocking me from taking a lot of rage powers at every 4th level.
https://www.d20pfsrd.com/classes/hybrid-classes/bloodrager/archetypes/paizo-bloodrager-archetypes/primalist