Ning should keep PP1 at bare minimum due to his Sword Dao (which is one and the same with his soul), forming the basis of all Eternal Omega Daos/Prime Essences, including those of Creation (the existence of all lesser daos) and Oblivion (the absence of all lesser daos), these Eternal Omega Daos being the source from which all lesser daos and concepts are sourced.
The argument for type 2 is then that due to the nature of Eternal Omega Daos serving as the basis of all lesser daos, and the nature of Creation and Oblivion, they should govern the existence and nonexistence (or to use logic terms that I abhor in this context, the A and ~A) of all daos, of which there are gods know how many, and Ning's Soul/Dao transcends that.
There is an argument for type 3 that is a mix of an old argument but also something I just realized was explicitly said in the novel, so
As said before, all daos are emanations of the Prime Essences, which serve as the basis from which they are all derived/expressed, with there existing, for example, the Dao of the Sword, which is an emanation/instanation of the Grand Dao of the Sword, so on and so forth all the way up to the Prime Essence of the Sword.
From that, we know that there do exist lesser instanations of the prime essence of creation and oblivion, and we know what they even are, the daos of life and destruction. Which seeing as they are emanations of those higher concepts, should carry those properties of being the everything and nothing of lesser realities, if not the same degree as their ultimate counterparts. At the "lowest level" of this hiearchy, which consists of Normal Daos, Grand Daos and Heavenly Daos, all of this then resolves into the Heavenly Dao of Primordial Chaos, which is explicitly the origin of all the aforementioned daos, of which yin and yang, life and destruction, are explicitly mentioned. Which in theory would be enough to keep type 3, seeing as the Omega Daos and Prime Essences very explicitly transcend that, so long as you accept the assumption (which I'm honestly pretty sure it isn't, but I don't have the epub file of the novel on hand and I'd rather not download it and take forever doing so rn)
And that would have been the argument, had I not found
this scan while looking over the scans to remind myself of stuff. Said scan, which explicitly places the daos of oblivion and creation as the two sides of yin and yang, which are already daos that explicitly exist in-verse, and our already existing logical duality is directly compared to, if not outright stated to be equaivalent to, yin and yang, and thus the daos of yin and yang, and the things which scale off it have a very solid argument to qualify to either be a logical duality, or transcend a logical duality to get/keep PP (But I will also just point out that in any case, ning is just going to keep the resulting immunities/state of existence anyways, even if PP is removed, seeing as he still transcends those concepts anyways, so it is what it is)