What I'm running for myself is a pair of tri res, move speed and life boots, made sure they have an open prefix so i could craft 12% WED onto them. It's imo the best option, but I'm also very resist dependent since I'm running a lightning coil, unique gloves & helmet + offensive quiver and neck. If i was using an EV chest I would just use insanely offensive rings (life+wed+attack speed+flat elemental roll+accuracy).I would recommend you to give blast rain a shot for single target (blast rain, added light, added cold/critchance w.e your colors can manage but cold is preferred, conc, WED). It outperforms frenzy by a long shot even if the tooltip doesn't show it. I got frenzy on a 3link with curse on hit to keep up my frenzy charges once bloodrage drops during boss fights.
That being said, I designed my build around end game mapping, hence why my build could be a lot more offensive then it is. So just keep in mind I got a slight bias towards defensiveness over damage. I don't really map with more then 3 people usually, which is why i focus on the defensive side of things.