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always keep: Acolyte of Pain
Against control you can keep card draw because you will never fatigue thanks to Dead Man's Hand so it means that you can focus on developing threats.
Omega Assembly is a good keep because you can discover which mech you want to have ... or you can be greedy and get all 3 after turn 10.
Harrison Jones -> Acidic Swamp Ooze or Gluttonous Ooze (it's not as that good because you won't get cards but you can still remove weapon which is super helpful against warlocks and most of aggro decks)
Cards that might be included:
Stonehill Defender - it's one of few options that you can play for tempo and also get sth interesting for later.
Spellbreaker - silence in always helpful in this meta because of all deathrattles and buffs.
Elise the Trailblazer - you will never fatige but at the same time you can also get a lot of packs
vs aggro: Fight for board control. You have to survive until turn 5 when you will be able to play Brawl. Best things to play during early game is Eternium Rover and Weapons Project (to kill most of small threats). Blood Razor can help you against zoo and odd paladin to kill their 1 health minions. To not run out of cards combine Acolyte of Pain with Warpath or Blood Razor. When you will deal with their first wave of aggression focus on getting armor.
vs control: You should win most of thouse games because you have enough removal for their minions and fatigue is not a problem. Just use Dead Man's Hand when you have another copy already in hand to deal with fatigue. It's important to shuffle another copy of Omega Assembly to get more threats.
If you are interested you can also check out this video made by Tommy Wave. Thank you for the deck showcase!