6/12 here.  

I like the rest, but don't like losing the *only* reliable source for resist rings.  

On the other hand Narthyl worms drop stupid amounts of loot in an area where stupid amounts of loot pile up quickly.  

If we're modifying the Brax loot tables, maybe spread around the rings to each mob type with the lowest drop rate on each?  They aren't incredibly valuable, but they shouldn't be removed from brax entirely.  Although I 100% agree with the rest of the removal here.   Zerkers are way too common.