Demon Form needs to change

On my current level Demon Form(Level 13) gives 20% increased Cast Speed, +5 to All Spell Skills and 140% increased spell damage.

I'm looking through trade website. One of the elements or physical spell skill +6 and over 20% cast speed staves starting at 2-3ex.

So in the end we are trading 4 ascendancy points with 3 ex staff while losing 5% life per second. Only upside left is dash speed in Demon Form.

I'm wondering if something gonna chance about this Ascendancy or i better respec early or create a Blood Mage? While Demon Form looks powerful at first glance its one of the worst Ascendancy in the game right now because of losing the weapon stats. Yeah i know it's shapeshift ability but it's not like a druid shapeshift. It's bonuses worst than a 3ex staff and there is a huge downside.

its ok if you reduce your life and stack life regen gaining high amount of stacks

the mastered darkness node makes it useless and not worth at all