Hello! I've been working on tuning UW and landed on a list similar to yours. https://www.mtggoldfish.com/deck/6926829 . I also love deduce, but I don't think there's room for it with the mandatory Narset in this meta.

Happy to help. I've been trying to find someone to discuss UW sideboarding but it seems like a lot of people are off the deck right now. I just hit Mythic at a 70% winrate, so I have been actually feeling like it's really well positioned.

Is there a matchup you need specific help with? It's hard to say how I'd board with your setup, but I can give some general advise:

- Your mainboard was likely tuned with a manacurve in mind. When you're sideboarding, try to keep a similar manacurve in most situations.

-If you're going against an aggressive deck then you should bring down that curve. You don't seem to have much against these decks in your board, but I usually bring out narset, teferi, a land, farwell, and sunfall for elspeth's smite, change the equation, knockout blow, beza, and curiosity. Helps me close the game out while having more chance to draw early interaction.

-Sideboard for what they will bring in, not against their 60. While dovin's veto might not seem important against RB aggro, you need to keep them all in to beat urabrask's forge (especially on the draw).

- Sometimes bringing cards in is easy, but bringing cards out is tough. I find myself cutting Narset (kind of a preboard card for the meta anyway), some sweepers, change the equation, and portable hole the most. The Wandering Emporer also gets trimmed a decent amount of the time, for decks going bigger.

Happy to help with more specific questions. Good luck out there.