After I first saw The Curator, I had a pretty negative impression of it considering its situational usage. However, I've been playing around with it for a while, and I have finally come up with this midrange deck.
Basically, this deck is a less aggressive, more control-oriented version of the typical midrange hunter deck, which focuses more on card draw and less on tempo and/or secrets. It still retains a strong earlygame, and COTW/Highmane continue to dominate the lategame.
Generally, this deck looks to have a strong earlygame with cards such as Fiery Bat, Eaglehorn, King's Elekk and Kindly Grandmother. The midgame usually comes down to removal spells such as Kill Command, Quick Shot and Deadly Shot. Houndmaster can also set up some favourable trades. In the lategame, you usually want to play Highmane/COTW, and The Curator. The Curator does not usually provide much tempo and is mostly used for card draw.
Normally, you will usually want to mulligan hard for your early game. Keep 1-2 drops and mulligan the rest, unless you have the coin; in which case I recommend keeping ONE 3-drop.
TLDR, play on curve and make favourable trades, followed up by cards such as Highmane and COTW to close out the game. The Curator provides excellent card draw, and the 4/6 body also trades well.
EDIT: I will no longer be providing support for this deck in favour of my newer, improved revamp of this deck.