Nocturnal Inspiration: This passive upgrades rank 2 of Hemorrhage to have a chance equal to your Weapon Critical chance to grant you 2 Ultimate, up to once every 3 seconds. - If it's CD is actually 3 seconds then it's laughable and bad passive, if it's 0.3s as in PTS than it's good and in tandem with share the spoils will help pure NB healers a lot and fits class really well, covering both crit and ult gen aspects of the class

An Eye for Exploitation: This passive increases your Weapon and Spell Damage by up to 1250 and reduces your damage taken by up to 12%, both based on your target’s missing Health. - this one is good, it fits NB perfectly but could use some numbers shifts like up to 1500 wpd and up to 8% mitigation

Above and Beyond: This passive increases your Critical Damage and Healing by 15% (7% against players). It also increases your maximum potential Critical Damage and Healing by 25%, meaning it adds to the normal cap of 125%, bringing it to 150%. - Idea of increasing maximum potential of crit damage is good but overall this one sounds like a joke. As it's obviously DD oriented passive I'll only take into concideration PvE DD and PvP group and non group builds. PvE - 15% crit damage? Really? Why would someone want to give up, for example, herald of the tome line(which also grants 12% crit damage - almost just as much as this passive) but also gives a lot of OP skills and some other good passives for 15% crit(25% potential crit for which you should sacrifice other stats) along with some other OP skill line for a useless shadow or siphoning skill line and 15% crit? Makes even less sense in comparison to other mastery, you give arcanist plain and permanent 30% damage increase but NB couldn't even keep that poor 25% crit. And in pvp it's even more laughable since it's just 7%... You can get animal companions which will get you MORE crit than that but will also give you access to other passives that are way better than NB's and access to the best skill in PvP(shalks) and a few other good skills, and you also don't get any profit from increased maximum crit dmg since you'll never reach that cap in PvP to begin with. This one clearly doesn't make sence and numbers should be way higher. I'd suggest changing it to this:

Above and Beyond: This passive increases your Critical Damage and Healing by 25%. It also increases your maximum potential Critical Damage and Healing by 40%, meaning it adds to the normal cap of 125%, bringing it to 165%. If Battle Spirit is active, it only increases your Critical Damage(but not Critical Healing to ensure it doesn't provide too much defence) by 25%.

This would make much more sence.

Evasive Trance: This passive causes you to dodge incoming attacks for 1/3rd of a second when activating a Nightblade ability while Bracing. Dodging any attack through any means causes your attacker to take 5% increased damage for 5 seconds. - This one is just bad design. At first glance it looks fun, but in order for it to work properly people would have to weave differently now: light attack - block - skill, which is unintuitive and just weird. Also it's a passive that heavily limits NB's mobility which also doesn't make much sence. Just remove "while bracing" requierement and this passive will still be weak, but at least it will not be poorly designed. I'd suggest update this passive to increase your damage done by 5% on top of this and damage taken increase(but don't make it 10% damage taken increase, would be too much) or update it to reduce damage taken by 10% if you want it to be more tank oriented but also viable in PvP. This way it would be good.

Share the Spoils: This passive upgrades rank 2 of Transfer to double the ultimate you gain from it (4, up from 2) while also granting the nearest 4 group members 250 Magicka and Stamina and 1 Ultimate upon activating. - good design and will help pure NB healers in tandem with Nocturnal Inspiration, but numbers are a bit low for PvE. It's should be good enough for PvP but in PvE your group doesn't need much sustain. I'd suggest changing it to 250 mag+stam and 2 ultimate if battle spirit is inactive.