I apologize if this is a duplicate thread or this question has been answered somewhere.... I tried to search for this and was drowning in 100 of topics about how broken Champion Points are

I am wondering how do Champion points stack? Do they stack with your gear enchants and/or racial passives?
For example, if I'm a Breton with reduced cost jewelry, would it be better for me to invest in reduced cost CP stars to magnify that already large benefit since there is no soft cap? Or do CPs not stack that way?