1 pointI'm afraid you were on the receiving end of bad luck. I also farmed DZ, but primarily with a group of people I knew so we could fend off attackers. Eventually, one of the exotic drops was a House from a named boss. I'd recommend farming the DZ named bosses with a group, grind the open world named bosses if you can't find a group, and grind the GE events when they're online. Otherwise, there's nothing much you can do as far as I know, maybe someone who's more seasoned can suggest alternatives.