iirc most of the Wands with crit (and other weapons too) were nerfed in DE. at least the wand with a socket and +10%crit from act1 were changed to 5%. and later vendors had only 7%crit wands.....
not that I complain. mages rarely use wands for damage. and if you have int+10%crit+socket(another 3wits with a rune)… you'll never need to replace it again
