[Senna]

Hexer with AOE burn just like that? Nah. Burn at the moment is very, VERY powerful. That given the nature of Hexer? That's too powerful to add another 'open' AOE to their kit, it would become the next Oil spam. The AOE DoT would be some deadly stuff. I also don't believe it should make Dark cinder though I understand the logic behind it since it's dark and fire scaling. Perhaps increase the burn level? Or give it a splash effect whereas if you use X curse/hex skill and they're standing within a certain range, the attack can bounce to that victim as well. (Reward for actually playing the class, yeah?)

Eternal Darkness - I'm okay with it actually being able to inflict blind and Dev just makes a hex/curse to do what Eternal Darkness does at the moment. Since this skill is kinda worthless if you're not running certain classes with it. Unless he adds items that can inflict blind on people.

Silent Spirit - If it has a CD, sure.

Essence Taking - It's mainly PVE so support is support.