Look at the second post in the thread to see how I level Conjurers 
No Primal Spirit from start to end. And it is more than powerful enough to farm SR 75-76 on normal for items.
Also, for a build with Primal spirit & Bysmiel’s Trinkets, try this one [1.1.4.2] Pet Conjurer - Birbs and Kitty, ez 96SR/Celestials/75-76 farmer