Ave_Dominus_Nox
I see her as a new female character that you introduced and referred to as his "right hand", but I could be wrong. After the arrival of Curze's father (which may be in 20-30 years), take her with him. He, in fact, like her and the chosen ones from among the population of Nostradamus, as the closest ones, can be initiated into certain secrets and knowledge that Curze could either get, develop himself or combine. After all, I'm just sure if he continues to eat all sorts of "Villainous" scientists, he will be able to become smart enough + the mind of the primarch. I fully believe that the development of the world and how the GG will make it in terms of science and other things will be able to prolong life. As a last resort, if there is a desire to prolong the life of his chosen one (who can become an analogue of the female captain of the world eaters), find the "mother" of all examples, save her from the killer (I don't remember who it was, but it seems from the black Legion) and use her basis to create an analogue version of the prtmarkh or Astartes, only in a female form when using the knowledge of his "mother".
Hey, is Conrad having a girlfriend or something? ... is that I see the very poor (and their brothers) as very lonely, I would choose Macha or Idranel (or maybe Yvraine although I confess that I am a fan of Guilliman x Yvraine) or you could also take Isha from Nurgle and from step get Lileath or take Khorne Valkia's bride, though you could also become strong enough to impose your will on the immaterium and turn any of those four into a woman (although you would need a lot of power (Khorne would be a sexy Amazon) ), you could also get Commander Shadowsun, but Tau don't live very long and I know Eldar can't breed with (normal) humans, but can they breed with beings like Primarchs or Emperor? (The problem with Human-Eldar reproduction is that the elda need a lot of genetic information, the eldar DNA is very complex (a primarch's DNA is hundreds of times more complex than the average human and the warp could also be used to help) , they need so much genetic material that an eldar can have a mother and several fathers or just one, that depends on the mother, he or the males have to constantly pump genetic material before and during pregnancy). He had an idea how to deal with the immaterium, if the immaterium became as it is because of the war and negative thoughts, how about a machine that creates positive thoughts by bombarding the immaterium with positive thoughts, calming it down and changing the gods of chaos? ? in his calmer aspect. You could also look for the Senseis the children of the emperor, also not forget Malal and Vashtorr, and finally as an interesting topic, chaos can infect technology as was the case with an STC (Standard Construction Template) for Iron Men that was discovered in the menazoid planet Epsilon during the Sabbat Crusade by Colonel-Commissar Ibram Gaunt of the Tanith One and Only. It had been corrupted by Chaos this PCE and then destroyed by Gaunt, so the chaos probably had something to do with the cybernetic rebellion. Macha: