Abyssal Drain:
Why is the GCD longer than a natural GCD?
Whoops! It's supposed to be 2.5s my bad!

Carve and Spit:
Why?
I made it a Weaponskill so it could synergize with Blood Weapon's recovery on landing weaponskills. But I wanted it to be able to be weaved still, hence why it doesn't share the normal GCD.

Dark Mind/Misisonary:
I had to condense the Dark Mind/Missionary section due to character limit issues. Sorry for the confusion. Dark mind would be buffed to 30% magic damage reduction at a 90s cooldown, while Dark Missionary would have its cooldown reduced to 30s because it's so specific (I understand this would require a tweaking to GNB's heart of light since it would be strictly worse than this).

As for why DA is 1000 MP and seems expensive. We currently have it to where our MP skills cost 3000 MP. Dark Arts would just put you to a similar spot to where we are now, but you can chose to only spend 2000 MP if you just want the base effects. With something like TBN, you don't have to always use DA with it. It's just if you have to use it for the Darkside extension, it wouldn't be that different than spending 3000 MP on it like we do now minus the missing EoS/FoS. But if you're just trying to use it to get the Blood on break then you only need to spend the 2000 MP.

I know it seems grab-baggy, It would just be nice to have a little more to play with than just our basic combo and the gauge/MP skills. It would make the homogenization of combos and gauges more bearable. They could really abuse the trait system to give us weaker versions of what we have now earlier. It's sort of what I tried doing with Shadow Wall, making it a basic TBN to get people acquainted earlier until the real deal at Lv.70.

I'll probably do an edit in due time since some other aspects in here didn't age well with some other ideas I've come to think upon. Such as DA interaction with Syphon Strike and Souleater. Would be better to solve those issues with the whole "getting basic versions early and then upgrading to current" idea I mentioned before.