While not repeatable in the same way Time Vault is, Time Walk doesnt require other cards or hoops to jump through to cast
Rare Dual Lands I dont have much to say about these lands that Naomi Krause didnt already cover in her set review for Midnight Hunt
Prosper, Tome-Bound requires considerably more setup to use optimally, but if your deck is already playing a lot of cards that let you play cards from exile, the value it generates from its Treasure tokens can be absolutely silly
If you have Metallic Mimic in play and cast something like Battle Screech, all the flying tokens enter with a +1/+1 counter, so it works wonders with go-wide decks
Well also be picking cards based on their broad playability, so cards like Mirrorform, which are unlikely to see use outside of Commander, wont earn slots here