Ring combinations and other qns.

is the crit ring even worth it on a paladin?

The Crit Ring is very much worth it on a Paladin.

With Blast's innate +50% crit rate and its +21% min crit multiplier, Paladins get more out of criticals than most classes.

I was thinking about the legend ring from the legend event in kms but im not getting my hopes up for it yet. Its 4 all stat and 3 wa and apparently stacks with the critical ring.

Is there any other better ring (not only stat wise but potential-ability too) that we can make from professions or something ?

Depends on your time frame.

If you're taking the Legend Ring into consideration (despite the fact that we won't see it for about half a year), then I will point out the Immortal Hero set (Set #52). Having both of them gives you a bigger bonus than having both Evolving Rings.