Almost as bad as having no heal(or pounce) on sedna this is absolutely stupid. For ONE skill point you get an area "stun" WITHOUT immunity. This is made of win. There are a few things sedna needs and her team needs and these are in order of importance:
-Heal foremost
-Healing wind, shitty crazy 22% heals oh yes.
-Pounce, no damage no dice, also an interrupt
-Silence, omg wtf awesome
-Counterhealing, suddenly you're the only one on the field who can heal. Awesome,.
-CD redux aura.(later on)
Getting 3 of these make you a decent sedna, 4 make you a good one, 5 make you a great one and 6 makes you the best sedna alive.
Sedna is this simple.