I don’t think it’s a good replacement in this deck, I’d go second Tinkertown Technician over Harrison. Mana Wyrm helps you stop early aggro, and can be great with Spare Parts and Unstable Portal.

Either one could work, I’d probably go with Foe Reaper.

Second Dire Wolf Alpha.

Second Squire or Dark Iron Dwarf.

Second Dark Iron Dwarf or a Piloted Shredder.

Just FYI this is a pretty old deck. Ragnaros, Sylvanas, or Loatheb.

Second Quick Shot.

There isn’t much difference, it’s more about whether you have (and like) Gormok the Impaler.

Second Worgen Infiltrator, and two Wolfriders.

It’s a solid one, there’s also Piloted Shredder as an option.

That would work, but you’ll probably be worse against aggro.

I would say Patron Warrior is probably better than this, but both can make it legend. Here’s the Patron list: http://www.hearthstonetopdecks.com/decks/midrange-patron-warrior-deck-list/

Yes, this is very good for climbing.

Warlock or Mage.

Dire Wolf Alpha and one Bane of Doom. You could also just do double Dire Wolf Alpha.

If you can create both Mysterious Challenger’s then you can play the more aggro version of this deck: http://www.hearthstonetopdecks.com/decks/rdus-grand-tournament-secrets-paladin/

I would just play this deck instead: http://www.hearthstonetopdecks.com/decks/aggro-warlock-zoo-deck-list/

Looks awesome, thanks for the submission!

Nefarian is probably fine, ideally we’d want something that spawns tokens. Hogger would actually be a good option if you have it.

Valid point, I’ll update it.