Here is what the Avs need:
A top end, youngish defensman who can play on the top pairing
A high end winger in addition to Landeskog
You are suggesting the Avs trade Landeskog, their 23 year old captain and best all around forward. You offer a 21 year old prospect defensman with 15 NHL games played. The Avs already have two 21 year old high end prospect defensmen in Zadorov in Bigras competing for spots this year. Pulock would be great, but for Landy? Hell no. Strome is 23, took a big step back this year, is clearly inferior to both MacKinnon and Duchene, and probably won't be protected by the Isles. A 1st rounder has good value, but the Avs aren't rebuilding. You aren't hitting any of the Avs main needs, and that is an absolute must if they deal Landeskog. Basically, offer a top end defender, or don't try. You're offering three nice pieces, but none of them are essential to the Avs, and in return you want one of the foundational pieces of the club who's only 23, the captain, and signed on a great deal for 5 years. Honestly...you should have figured the answer out before posting.
Also, an expansion draft is coming. The Avs would almost guarenteed have to expose one of Pulock / Strome, so that makes this a doubly easy no.