Yeah Ryunohige is pretty good. I need to look to see how the dmg is now but when it came out the dmg was way too low for me. It is really hard to get...

Camlann's is actually really useful not what I would call inferior. Since I know I can't use Drakesbane on a normal mob without getting ruby... Camlann's I can use at the start of the fight to take about 50% of the mobs HP. Outside of Abyssea Camlann's does do the same and sometimes more dmg than Drakesbane.