It’s that time of the NHL offseason when tumbleweeds can be spotted rolling across ice rinks. Training camps are still weeks away, but the biggest summer talking points have been beaten to death with a hammer since early July. That means it’s the perfect time to construct goofy rankings with arbitrary criteria, and this week, that means posing a question that’s relevant to the Avalanche. Does Colorado have the best “core” in the NHL? Defining the word is tricky.