Actually, Ony drops 150-200g, some gems, and some higher-level blues. It's probably not worth the risk compared to dailies (especially considering how long it takes to kill her with only a few DPS), but it's not altogether worthless. It's the first thing I'm planning to try once my tank is more uncrushable, but I'm pretty sure someone will beat me to it. It was done with less than five players even at lvl 60, so I think it's just a matter of someone taking some wipes to learn the multibox version of the strat.