Nice Article. But I am pretty sure Sudden Shock/Rending volley in the sideboard is for Containment priest rather than for Mentor.
Ravenous Trap/Extirpate probably deserve mention seeing as they are the hardest answers to interact with for most Dredge builds (only Unmask and Cabal Therapy).
Also it's probably best to be prepared for the Dredge decks that have Transformative Sideboards as well, since it's a radically different matchup.
This last point is key, and the article doesn't really address it. The Dredge deck that most recently 4-0ed a Vintage Daily had transformative sideboard.
Dredge has a very strong wind in it's sails right now. After MUD, it may be a favorite to win Vintage Champs.