Personally I recommend grabbing a SoJ, if you don't mind losing a little vit. The extra damage against elites is great, especially for higher MP. I like the mempo, since the dps is decent and the EHP is great. A crit one will be better of course but those are a bit expensive.
Otherwise upgrades don't look cheap so crafting is a good option. I'd say bracers and ammy to start, bracers for extra AR if you want, otherwise I'd start with ammy until you get either a good trifecta or a better crit/CD version. Keep that one you have though since it's probably great for CMWW if you ever want to run that.