So I've been using this list as of late mainly due to refusal to play Mardu Vehicles or combo (I know, terrible reasons to simply not play the best decks). While it certainly has game against combo with the maindeck t1/2 implement of combustion (they have no real answer to it aside from holding up mana for disallow upon activation), I struggle against Mardu on the draw, as do most people, despite the plethora of removal I play, and with very easy revolt triggers. Against the other top deck BG, or what used to be top deck, I lose g1 quite handily due to my threats being outclasses, but post board I become walker heavy and can easily take over a game. My biggest problem with the deck might be the fact that I want it to be tezz centric, and I find myself boarding him out frequently, because even with him being 2 removal spells in one, he does not match up well against creatures he can't interact with (see vehicles) and damn near everything plays them. Is playing a grixis tezz deck to much of a gimmick or has anybody actively made this work. I can't go a whole tournament hoping to avoid vehicles, let alone a single round hoping to avoid vehicles, even if the other matchups are at least 50/50 (BG), or heavily in my favor (combo). Sideboards are almost always a work in progress for me, but I have always been a fan of making it go as wide as possible so I have a little bit of something for everything.
2 Pia Nalaar
4 Scrap Trawler
4 Scrapheap Scrounger
4 Walking Ballista
1 Chandra, Torch of Defiance
4 Tezzeret the Schemer
4 Fatal Push
2 Heart of Kiran
4 Implement of Combustion
3 Metallic Rebuke
4 Renegade Map
4 Unlicensed Disintegration
3 Aether Hub
1 Foreboding Ruins
1 Island
1 Mountain
4 Spire of Industry
4 Spirebluff Canal
5 Swamp
1 Wandering Fumarole
SB:
1 Chandra, Torch of Defiance
2 Goblin Dark-Dwellers
2 Gonti, Lord of Luxury
1 Kalitas, Traitor of Ghet
1 Key to the City
1 Liliana, the Last Hope
1 Metallic Rebuke
1 Ob Nixilis Reignited
1 Radiant Flames
2 Release the Gremlins
1 Ruinous Path
1 Shock