That thread didnt take into account the full sp% increase from morph set, sohee/variant, etc.
And according to my calculations, that makes it incorrect.
A +9 Lunakaligo with 3 AK cards means:
163 atk from the weapon and refine, +75% damage from the cards, and +0sp
A +9 LBW with 2AK cards means:
153 atk from the weapon and refine, +50% damage from the cards, and +465sp (it's 465 and not 300 becuase of the +55% sp from morph set and a sohee card; it's a little bit higher than this with unrefined variant shoes instead of sohee)
When these different stats are put into RMS's stat calculator with a typical Asura build, the LBW-stat one does almost 10k more damage due to the added SP.
+9-10 LBW remains the best weapon for Asura, but Lunakaligo is still really amazing for Monk class for many other reasons. So much so that I am basing my alt's build and equip entirely around being able to solo tatachos effectively. In a few more levels I should be able to farm tatachos easily on that alt