Based off NBC sports article "What would a potential Jack Eichel trade look like? History offers some clues" Looks at Tyler Seguin and Taylor hall trades, and concludes the structure would be :

"One really high-end player or prospect. Usually a recent first-round pick. Beckman and Khovanov are Wild prospects 4 and 5 with Khov being the second rated Center

An NHL veteran or two that is a depth player, or mid-roster player. Rask is a 2-3C and dumba is a top 4 right shot scoring D

Two draft picks including a first-round pick" 2021 1st rounder and a 22 2nd rounder

Umm idk it ok but not at the same time

If i'm buffalo im shooting my shot at greenway eriksson ek or matthew boldy because im giving you a top 10 center

Not Fiala? Probably more likely you’d get him instead of Ek. I’d be more than happy to trade Boldy and keep one of the other guys as well

i think the structure of Dumba, Rask, a 1st, and a 2nd is correct. Although the other piece is going to have to be pretty large. I think its gotta be Boldy. I don't think the Wild would be willing to lose Greenway, and Ek is also a tough sell. I would say its gotta be Boldy and maybe another prospect. I still think the Rangers could offer more for Eichel though.