Cool Boros deck! I've been wanting to build something like this in standard for a while, and it's nice to see it all together. I especially like that there's nothing from Origins or Dragons of Tarkir, so you'll be able to play this for so much longer.
I think the deck is pretty close to dialed in, and with a couple small changes, we can make it a bit more consistent. Getting up to 4 copies of
Weapons Trainer, Hamweir Garrison, and
Avacynian Missionaries //
Lunarch Inquisitors would go a long way. After all, the biggest problem with equipment decks is they tend to be light on creatures that can actually wield them, so we don;t want to get backed into that corner if we can avoid it. To make room for these 4, the easiest cuts would be
Open the Armory and
Encircling Fissure (redundant since we already have a couple
Repel the Abominable). That would be 5 cuts, but lets us run a 4th
Ride Down (which is too powerful not to run in a deck like this).
Thalia's Lieutenant may be worth considering too because of the amazing interaction with
Hanweir Garrison (double human trigger every attack, making the Lieutenant huge).
That covers the main deck, now sideboard tech is important here. This deck is really susceptible to board wipes like
Languish,
Kozilek's Return, and
Radiant Flames, so we need a way to deal with that. Maybe a couple
Selfless Spirit or
Eerie Interlude in the sideboard? Spirit doesn't protect against
Languish, but also flies and welds the equipment well.
Eerie Interlude can be a nice surprise, though we'd still lose all our tokens and our equipment would become unattached. Lastly, we need a way to deal with opposing fliers, so maybe some
Declaration in Stone in the Sideboard, or another couple copies of
Blessed Alliance.
I hope you found this helpful. If you have further questions, feel free to ask. Good luck and Happy Hunting