as some general advice on those p1t1 plays, I find putting helm in the center to be better so you can accelerate. The “classic” one as you call it is better putting the wings directly in front of the tile, 1 space away from the general so that they can’t block you off from accelerating.
As a more general thing, since when was mechaz0r a meme 
Aww damn I wish I had spirit;;
The moment z0r was revield I thought of a deck like this, also it’s finally a deck i can use my 2 prismatic ro9m in. Lyogiggle.
Depends on the preferences, ramping might be indeed more beneficial when you have something nice to ramp into (like Dioltas). Often in the early game I’m playing 2 minions per turn, so blocking the enemy movement feels nice when you aren’t focusing on the beefy stuff yet. But yeah putting Helm to the center might generally be better, I’ll take that into account! As an Abyssian main I can’t say I’m really an expert on Mechs. 
I don’t know what else than a meme I’d call a Lilithe list with 3 Z0r, 3 Lurking Fear and no Revs? If it’s not memeful enough you can always make your own list with some more ridiculous Dying Wish minions ^^
Also, is vorpal reaver neceassary?
Vorpal is best played on curve (5 or 6 mana, depending whether you have played LF or not). It’s a huge threat in itself, and if it’s destroyed without dispel it can lead to a big HP steal next turn if you manage to play Shadowdancer. 5-mana Vorpals are really threatening, since there are only a few things around that remove them cleanly for a lower cost (Aspect of the Ravager aside). It’s also surprising how many people just leave the Reaver unattended, I guess it’s so rarely seen on ladder these days? A 12dmg burst feels powerful enough. 
Can I just replace it with spec rev?
Mech abyss is a meme! Not even mentioning all the dying wish trash!
Yeah easily, reconsider dropping Shadowdancer to 2x though since most of its utility comes from the combo.
Make daddy proud Zor! When I saw the thread name, I though for sure that you were going with Consumimg Rebirth/Blood Echoes so you could keep killing Zor, and potentially have multiple MechaZ0r!!!s in hand. XD
I think your original plan of running Grasp of Agony is actually very nice. Maybe remove the Shadowdancers since this deck doesn’t look like it wants to play a long game. Void Pulse could provide you quick healing if you really want it.
Ahahaha that’s an awesome idea! If you make a deck like that I’d definitely want to see the list 
I feel that without any Dancers I’m often just easily killed around 5-6 mana (or lose all my hand even with the Spelljammers), but I could see Void Pulse working nicely instead.
Dunno if it’s my bad habit of playing countless seasons of Zirixz0r but usually I go :
In case 1, it’s almost garanteed ramp on turn 2
In case 2, it’s still disturbing for the General (blocking access to mana tile) and ramp is easier/assured by just going one back on turn 2. If you play it near opponent General, he still can go diagonal and play a minion behind Wing to cut the path
Just my 2 cents about Mech’s openings 
Mmmmm no nekoma or Desolator, dissapointed. I think this has the potential to be quite powerful with a little tweaking, perhaps something like this:
Desolator sadly benefits from Lurking Fear only once per each card, so I left it out this time. 3-mana Dioltases provide so much delay/control, that without them (or the Lilithe stuff) I’d say it’s a different deck entirely. More efficient maybe, sure 
I just love my thicc waifu stuff too much I suppose!
Nekomata would be a nice alternative to Jammers, although it doesn’t contribute much to the mech plan directly. I wonder how I left them out of consideration.
Well nekoma sort of helps with mech plan directly by fetching Zors.
Could still run Lilith by swapping in inkling over perhaps void pulse. I just rather like cass’s ability to kill your own Desolator, and the extra efficiency of punish/class over Lilith/ritual. And only getting one proc off of lurking doesent make Desolator any less valuable though.
But yea it is a pretty different deck.
I have named my version. “Meching a Wish”
And the runner up:
DeCH. (Because it sounds like deck, also Death (Dying Wish), and Mech.)
Is it intended BTW? If it lowers the cost of all cards in the deck, shouldn’t cards keep their cost after being played?
nope, all minions that have their mana cost reduced have their mana cost set back to their default after being played. the same happens with every other form of cost reduction. even gore horn from koan of horns goes back to 3 mana if hailstoned
Was there any comment from devs on this?
I believe it’s intended, too. Would be pretty amazing if the ramp stayed though.