Max Ice Wall. You don’t need more than 1 point in Ice Pike.
Get a point in Bone Pointing, Kundela is mediocre without cursing the target first.
I personally left Levitation at 1 because I don’t use BC that often, I usually use it with Ice Wall anyway which has a longer cd.
Some like maxing the flight duration, but I’ve found that I usually cancel it after BC (and healing up) since it disables several skills (Nga, Kundela, Snow Rolling, etc)
Max Blood Sucking if you can, we need all the self heal we can get.