Grief looks like it's sick. If I'm looking at it right, you can stick that sucker on a normal item, not even exceptional or elite, and still have a weapon that outdamages BotD one handed. And reaches the last BP. With a fraction of the requirements. It's a shame that Lo is so expensive at the moment.
Oath is nice and inexpensive, but I'd seriously hate to lose both an Eth Elite item and a Mal + Pul if you rolled a lowly 200-ish ED. That's suck tremendously. Personally, I don't have a personal fortune of runes, so I'd rather not take the gamble, shell out a bit more and get something higher end with less chance of rolling like crap.