If the only way to get named thralls (which you need to craft the best armor) is to do the endgame grind to get 1000 chaos to summon the best surge, and even then only have what looks to be a very slim chance at getting one. Then what is even the point in getting the named thrall? You have already completed the endgame content serval times over in order to farm up 1000 chaos, what is the point in better armor if you already are forced to complete everything in the normal armor just to get a chance at getting a thrall to make the better armor?
In the normal Exiled Lands map, you can get a named armor thrall from the open world camps, and then craft better armor to take on the dungeons or the northern parts of the map.
I understand the advantage in regards to PVP since you are now stronger than your opponent. But I don’t see the same reward for PVE on the Isle of Siptah.