Try out your amulets and check out two things: (1) damage changes, and (2) toughness.
Whatever has a higher input of both of these factors is probably what you want to use. If you are using a temerity and you got no other "life on hit" effect, then this is preferred, of course.
Well i don't use life on hit on my sorc.
The problem is crit dmg ofc higher on the first but missing rhe all skills