Don't know if you still need this but I have this, don't know what build you want to run but for sentry/cluster arrow build I have pretty much full ancient set, dependant on your paragon level does 500m-1b crits and can solo GR 50 easy enough if you know how to play it correctly, and levelling set I also have, ranging from 100m XP a kill to 2.1bill exp a kill.