[Helion]

Your best use of the skill points will be in the cool down of your soul stealers, followed by the cool down of the soul using attacks. If you want to use some on empowering the attack power, I would do Lacerate. It has the fastest cool down and is your most used soul stealer. It is also used by both dual swords and claws, so the extra points won't be wasted there. Check the thread in this section by Loveless (Trickster Guide). It is full of very good info to get you going.