I find out why you are using them up.
Got some pics?
Spherical end links are race stuff and don't do well on the street, dirt mud, constant movement of everyday driving will accelerate wear.
Factory setups last for over 100k miles, sounds like you have a problem that needs to be addressed.
Think about it like this, you can't inflate a tire with a hole in it by putting say nitrogen in it only thinking nitrogen is better than air, you have to fix the hole.