if you want to have a high winrate against paladin, warrior, rogue and shaman, try this out. With harrison you can actually deal with cards like tirion, doomhammer which where big problems for rogue before. It is also awesome for your carddraw which can lack without drawing auctioneer.
Always keep SI7-Agent, backstab and tomb pillager
based on the matchup:
Hunter: antique healbot
Paladin: deadly poison
Warrior: deadly poison and Harrison Jones. When you have the coin keep auctioneer.
Warlock: deadly poison
Priest: deadly poison, bloodmage thalnos and azure drake
Druid: deadly poison, Sap
Rogue: deadly poison
Shaman: eviscerate and deadly poison
At the start of the game you want to remove your opponents minions and play your own minions to set your opponent under pressure.
After that you are searching for your combo pieces through auctioneer and azure drake.
You should play really aggressive to finish them before they finish you. Facehunter is a hard Matchup, but with playing aggressive it is possible to win, but this is by far the worst matchup. Midrangehunter is nearly as hard as facehunter but with sapping there big minions like savannah highmane you have a good chance to win.
Secret Paladin is an awesome Matchup. It can be hard when they have a perfect curve but even then bladefury and fan of knives can win you the game.
For Oil Rogue Warrior was the worst Matchup. With Malygos Rogue it is one of your best Matchups. Tomb Pillager is really strong in this Matchup and often wins the game because your opponent dont have an answer to it.
This Matchup is pretty good. It is really hard for them to clear your 4 health minions. Try to finish them before they can play Reno. And even if, you mostly have such a huge boardpresence that you still can win.