[0.97] Dual Blade

Personally I'd keep that for HP washing your pally and bucc and whatever other non-mage chars you have. Unless you're assuming BB is around the corner and HP washing is no longer needed.

Also, does your mage have the LUK to wear level 71+ mage overalls? If you do, then yeah, a mage overall with 6% INT will be better than that robe. If you don't, you need to plan how to get that LUK before you go selling off the robe.

Good point to think of, my evan doesn't have the LUK so I got to keep it first.
No intentions to HP wash, saving the cash for cubes in future.
@ZS : Do you sell your items thru MTS for cash , or for mesos?