Tried soloing this yesterday as 65SMN/WHM. I used the Carbuncle method (summon Carbuncle, run away until you can't see the mob's HP bar anymore, wait until Carby is dead, repeat.)
It worked beautifully until the NM was at about 15% HP. Then for some reason my newest Carbuncle could no longer keep hate. I guess all that summoning generated enough hate on me eventually. Luckily there was a 75BST nearby who came to my rescue.
I think I could've finished it off solo if I had used Astral Flow when the mob was at about 20-25%.