I myself have not much idea about in-depth damage maths, but to give my opinion on the matter...

Souleater - a smart change, an alternative to that is slap lifesteal on Blood Weapon, just sayin'.

Dark Passenger - That DOT is just overpowered and the diminishing returns don't give it any justice. Even if it still costs 2400MP, that is still a total 50 potency more over DA-Carve that can be used twice as often. The increased enmity is unnecessary considering the total damage this skill alone does.

Dark Mind - I am not a friend of this. I'd rather see Rampart return as a baseline Lv8 CD and Tempered Will being plunged into role actions, with the same 180s CD.

Shadow Wall - unnecessary overkill against critical tankbusters. You still have TBN + Shadow Wall and Rampart-TBN-Awareness for that...

Plunge - I like that, but given the cooldown remaining at 30s it can retain potency to like 150-200 regardless compared to Onslaught. It also has no extra enmity unlike Onslaught.

Sole Survivor - love it.

Carve and Spit - I although it looks like a three-fold attack, I genuinely wish it is not unless the initial hit dictates whether or not the follow up hits crit / DH like the first one. The consolidation of DA-CaS into one button is actually good enough to down the button bloat and DA consumption a bit. That Blood Gauge bonus is massive, maybe tone it down to 20-30?