By not "not handle the deck" do you mean that you have no ways of stopping it's gameplan, or that your decks aren't able to keep pace with Derevi's speed?
If this isn't the Derevi stax build it's likely the latter. The Derevi player is able to build up their boardstate and value engine faster than you are, correct? If this is the case, we can work on improving your decks' overall gameplan so that you won't necessarily need to stop the threat, you can also be the threat.