in contrast to poster above I'd suggest you do turn the healthbars ON ... set max camera distance and move view to something like a birds view (prevents the healthbars from jumping around too much) ...
I've done it with my fortitude buff only and 30 oils (and fear is also nice) ... having something like thorns would also help I suppose ...
most importnat thing I learned: KEEP YOURSELF healed as well ... grab a healthstone from a friendly warlock, it will help
anyway, bring on patch 1.8 so I can finaly put an enchant on the staff
