They are both extremely good but if they are going against each other I personally give the nod to the Wand. GoW has a static amount of damage with no variable while the Wand has a variable that can make it hit less hard or more hard than the GoW. The Wand however can heal when you get to lower amounts of life and can also shield/reflect light damage. If I could only pick out one of the two, I'm going Wand every day. But I think that's also why the GoW has gotten all the way down to 10m or so on the trade post while the Wand still consistently sells closer to 20m.