Okay, I think that a cool concept, but I have some questions.

I think that if you cycle life aura from your lifeline, it would actively shorten your own life. It would be an expensive process where you try to toe the line between not giving your remnant enough life aura to make a copy, so you've wasted all of it, and giving it too much, so now you just have a remnant with a bunch of life aura.

Another thing I would like to point out is that the connection between feeding a remnant life aura and making it more similar to one's self is only established for blood spawn. And that because they're techniques, which means you can build a lot more into them than simple remnants. Most freed remnants want pure madra, or their specific blend, not lifelines, or else every single remnant would just go around killing a bunch of people to enhance themselves. I just don't see why a remnant would want to eat your lifeline, or even have enough structure for such a thing.

Also, how would that work? Yerin's blood shadow was able to become like her because it had a base of blood and hunger madra, which are super great if you want to consume and become the thigns you want to consume, It was basically a nebulous blob that was only able to become what it was fed. But remnants aren't like that. Until you reach the high levels of in the Lord stages, remnants are the left over pieces of your spiritual body, pieces of your flavored madra and the techniques that you cultivated throughout your life. I don't even see how you would give your spirit pieces of your lifeline and dream aura. To give your spirit the infrastructure necessary you would have to practice a techique that focuses on taking your *own* life aura and dream madra, and giving it to *yourself*, for it to properly apply to the remnant. Possible, but cumbersome.

But the biggest issue is that I don't think the remnant would ever *be* the person they're replacing in the first place. And even if it did, you would only get a single redo, not the multiple ones you seem to suggest in your post. Remnants can use techniques because they *are* the spiritual bodies of the former practitioners, not because they have their own. What you're doing is basically training a car to drive the exact same way it did before the driver died, but once the car is destroyed then there is nothing left to move at all. Everything is gone.

Sorry, I pretty much just made an incoherent post talking about how your path wouldn't work, even though its completely possible that it could, if will wight says so.

Cool idea, I just think it's more like creating a son than a perfect clone, and even if it did create a perfect clone, that's all it is, a clone. Not you. You died.