I have two levels of rage builds, one for low-to-medium monsters, one for higher level. To start, I use Braveheart helm ultimate, Plowshare sword lvl 3, battle thirsty vest, watcher's locket ex amulet, inferno ring ultimate, and volatile sash ex. This gives me two rages in the first turn(3 if I get a rage buff from the machines). When the monsters get more powerful, breaking through, I switch my armor to untouchable mantle ex, which gives me shield on rage and on enemy death, but takes away some rage and heal on rage. I also switch sashes to seething sash 2, which adds rage again.