You combo off and play one 99/99 hangarback. Next turn you swing with Hangarback and Pili and make infinite mana for the combat step. They both die in combat. Continue from there.

If you have 99 flying thopter tokens, I hope you have won the game already. I guess it's an interaction, but seems pretty fringe. Although you did say it was hilarious, which I'll give to you, rather than relevant / competitive.

I do like the Longbow instead Sunbeam Spellbomb swap. Longbow gives you an immediate way to win the game with AI or Trinket Mage.

That begs the question though, with Longbow taking the spot of your 1 mana wincon, do you need Hangarback? I think there are better small creatures to run mainboard, like Spellskite, or Tezzeret (not a creature, but still), which could be more effective. How good vs aggro is Hangarback, and what other creatures are better vs aggro? Wall of Omens cantrips, Spellskite eats burn spells and pump spells, Lingering Souls makes tokens to chump with, Path to Exile can just kill their creature, etc. Basically I think there are better options now that you have a cmc=1 artifact wincon.

By the way, scary thought: This deck + Stoneforge Mystic. You can use SFM as a cmc=2 way to tutor Longbow for a wincon, but when not comboing, you gain a fantastic way to stall the opponent. Also an additional way to win when not combing, which I know isn't a priority, but it's still relevant. Running Swords and Bskull would be a lot of fun.

Hangarbacks get around Leyline of Sanctity while also providing a blocker and a long game plan if I get hit by say... Slaughter Games. Hangarback can also keep coming back for more when combined with Academy Ruins or Auriok Salvagers. In the absence of the bomberman wincon and subsequent presence of tez, at least one hangarback would leave the deck -if not both- perhaps in favor of removal, perhaps Spellskite. In its current form though, the deck can't lose them. It just can't afford to.

Ok so based on my performance at SCGIQ Vacaville, Sunbeam Spellbomb needs to stay in The Minefield simply to help it outlast the first few turns against aggressive decks. However, Viridian Longbow will be included in a more competitive Esper version of this list which I am calling The Minewalker (as an homage to ToolmasterOfBrainerd). The Minewalker is far stronger against aggressive decks than is The Minefield, but as a result takes an ever so slight hit to its control/combo match-ups. When I say slight I mean like a 3% drop in winrate against slower decks to gain 25% against aggressive decks. Check out The Minewalker and let me know what you guys think!

So I just realized Pili-Pala + Training Grounds + Viridian Longbow is a combo... It doesn't make mana but it is infinite damage. I probably won't incorporate it into this deck since I can't fetch Training Grounds but still, it's a fun interaction

Yeah, there are a lot of infinite combos with pili-Palla, but none of them are anywhere near as good as grand architect.

I notice that you're missing a few alters.

twas the best I could do.

Sweet. Thank you DERPLINGSUPREME! I'll add those as soon as I get the chance.

Currently considering Echoing Truth against the sideboard Leave No Trace. Thoughts anyone?

I don't know the deck well enough to say. If you're getting the Echoing Truth idea from my deck, then don't do it because it's some pretty specific tech in my deck. In here, I don't think tokens are a real problem, nor can I think of any creatures or planeswalkers that are big problems. Destroying an enchantment or artifact is so much better than bouncing it too. That said, in the Tez version without the Aether Spellbombs, you might need the bounce effect which you lose, but having path to exile kinda makes up for it...

I don't really know, but those are some things to think about.

Neither deck really NEEDS more creature removal, but the way that Leave No Trace gets played, you board all copies available in against any deck that runs white just to make sure that they don't board in Stony Silence. Because white decks often use cards like Lingering Souls, other enchantments, or just use creatures in general, I figure that maybe Echoing Truth's greater versatility means that since I am forced to board it in against white, it won't hurt quite as much.
Against Stony Silence, any card that removes all copies from play for one turn serves the same function, as I will only use the enchantment removal on a turn where I can just win with it gone.
Leave No Trace also only hits enchantments, not artifacts.
Granted, token decks are not problems, no planeswalker is TOO difficult for me to handle, and most creatures can just be ignored in both decks, but having another out to draw into seems not just nice, but superior.

I was getting the idea from your deck though :P

In The Minewalker I could also always just do a 1/1 split in the SB between the two for those decks that run a large number of enchantments like boggles and UWx/UWxx Gifts.

Considering Ensnaring Bridge in this deck. It could replace the Hangarback Walkers. Viridian Longbow could be snuck in instead of a Chalice of the Void, which could be moved the sideboard to replace the sideboard Engineered Explosives given that Ensnaring Bridge already helps against aggro decks. In the sideboard, the Leave No Trace could be swapped for an Ensnaring Bridge, given that it can hard lock most decks that run Stony Silence, especially when combined with Academy Ruins.
I would also replace Thoughtseize with Path to Exile and replace a Watery Grave with a Hallowed Fountain.
Since hangarback would leave, Vault of the Archangel can be switched to a Hallowed Fountain or Plains.
Given this deck's natural strength vs tron, and the fact that Ensnaring Bridge already hurts eldrazi aggro, I would also probably replace the sideboard Crumble to Dust with another Ensnaring Bridge and maybe, heck, another Chalice of the Void.