MTL decline and blocks your number

You would be fired

EDM declines, we can just sign Spezza instead of trading for Frederic, can guarentee we won't trade for Risto, MTL trade is declined by both sides

Montreal definitely isn't helping Toronto unless we are getting significantly overpaid for the package. This isn't the case.

You do realize that Buffalo has cap space to sign everyone, does not have to trade Ristolainen, Ristolainen had nearly double the hits as any TML D-man, and will not be traded for loose change.
Buffalo is not under the gun and will only trade Ristolainen for a player or players who will have an impact, neither Dermott, nor Gauthier fit that description.
If they are as good on ice as they are in your mind, then keep them.