I would suggest kundela slash lv5 for more dps instead of BB. BB is too restrictive. The intasurta glove only works on BS not BB if not mistaken.
As i notice, kundela slash wont cause curse status to mobs…it only does double damage to cursed unit, perhaps the skill description is wrong.
Levitation lv depends on your preference. I like to fly longer and feel more safe when casting all my skills.
my current skills point (lv 290+):
BB 1 = the dps would be good if all mobs bleed
BS 10 = more dps, more heals
Bone pointing 1 = for kundela slash double dmg (might take it to lv3 for max up time)
Levitation 5 = as i mentioned
Kundela slash 2 = more dmg, low cd (will take it to max lv)
Blood curse 5 = more dmg
*Inspired by ronaiaronuit