I would say it would help Thinian if he had children. That way he would have a reason for the pot being heated, a cold start on a cauldron would take a couple hours to heat up. It would also give Detrinus a stronger connection to the Wood Elf family. Then he'd have a group supporting him in his time of trials. Then when he leaves, there's also a stronger feeling of "Oh crap" when the cats are questioning him.
The first couple paragraphs make me wonder why this man who has lived for more than eight centuries even wants to talk about this part of his life. He starts off talking about how parents want their children to do better than them, and try to plan their futures, but his parents did the opposite. Considering he's lived eight hundred years when normal Imperials in Tamriel live around sixty, doesn't that mean in the long run you're better off if your mom is a skank that abandons you?
Heir of importance should be Air, and the word Skank sounds really 90's. Not that you can't use it, but it can be jarring.
Overall the impression I get is that he would be wanting to hide his past to some degree since he has accomplished much. Kind of like Cary Grant. Cary's mother was taken to an insane asylum when he was young, and he grew up poor and desperate. When he made it big as an actor, he hid everything he could about his past.
From the way your story is going, you could write this story something like Citizen Kane. He has a humble beginning, and the story looks in on him in the high and low points of his life. In the very end of his life, he looks back and the thing he wants most is Rosebud, his childhood sled. It represents a lot, and in the first paragraph of the story you even hint at that. If I've let a cat out the bag with that, I'm sorry.
I don't know how the wild hunt would be "used", are you saying they manipulate it?
We cannot control the things that happen to us in this life. We are powerless to manipulate our future. For even if we could, wouldn't the outcome still be the fate laid out before us?
Hold on now, this is contradictory to what you said here:
Knowledge, wisdom, power, fame, wealth. We'll do anything to have them. We've already gone to measures to ensure our children have exactly what we want for ourselves -- to have our name ring on through the ages.
We'll do anything to have them, but we're powerless to manipulate our futures? Is he saying he doesn't have a drive to accomplish anything and he's just lucky to randomly meet his aspirations?
Kha'lel? Isn't that Superman's name?
I'm wondering why he assumed they had a foul intent by asking where he was from. In these times without communication, every town would be asking a traveler where he came from and what was going on there. It's their way of keeping track of things. Maybe he should realise why they wanted to know a little later when he sees them getting a posse together.
If there is nobody around and he assumed they had gone to attack Longhaven, perhaps he should have attacked their town resources while he had a chance. Take what he needed and burn the food storage, break their idols, and poison the well.
The story is moving nicely, but I can't get it out of my mind wondering why a guy this old is going into so much detail about something he likely wouldn't remember in such detail. Even things ten years ago that happened to me can be real hazy in my memory.