I don't love the Dark Confidants in his build either, but I'm more interested in his inclusion of Rhonas and Hazoret. Seems like a decent way to give the deck more threats and the gods match up well against Eldrazis and Grixis Death Shadow's creatures.
The instant to sorcery speed difference really isn't as big as you'd think. Against Naya Blitz and Experiment Jund, you really just want to pick off any early creature they play, doesn't really matter which since you just want to survive long enough to get your bigger creatures out and stabilize. For that purpose, Mizzium Mortars does it's job just fine.
Searing Spear does better synergize with Huntmaster, but honestly that situation is just as seldom, if not more so seldom than an overloaded Mizzium Mortars. Considering that if you're capable of playing Huntmaster and he lives for you to be able to flip him, I'd much rather play Restoration Angel on the opponent's turn than a Searing Spear to gain even more value and board presence. Searing Spear looks even worse once you factor in all the relevant creatures that it cannot hit: Loxodon Smiter, Restoration Angel, Frontline Medic boosted by Mayor of Avabruck just to name some. Anything bigger can be taken care of by Selesnya Charm which is why I feel a split between Mizzium Mortars and Selesnya Charm is probably the best setup right now. Personally I'll be trying 4x Mizzium Mortars 3x Selesnya Charm this week with 2 Pillar of Flame on the side.
I dislike Arbor Elves because they make you play too many unnecessary forests while giving you only a slightly higher chance to ramp early. More forests increase inconsistency for Boros Reckoner as well. 4 Avacyn's Pilgrim and 4 Farseeks are all you really need imo. We have access to a full playset of Boros Reckoner and Loxodon Smiters, and combined with Searing Spears and Mizzium Mortars, you really shouldn't have much trouble against aggro.
I feel like Bonfire is not well positioned right now and often times you just have it stuck in your opening hand dying to aggro before you can hard cast it for enough damage. I say with the meta currently being the way they are right now, Mizzium Mortars, Searing Spear and Selesnya Charm are your go to removal spells. Selesnya Charm can either chump block a 2/2 or if they pump their creature with either an enchantment or Ghor-Clan Rampager, you can exile it in response. You may also want to up your land count to 24 lands as well.
https://www.mtggoldfish.com/deck/687850#paper
Searing Spear does better synergize with Huntmaster, but honestly that situation is just as seldom, if not more so seldom than an overloaded Mizzium Mortars. Considering that if you're capable of playing Huntmaster and he lives for you to be able to flip him, I'd much rather play Restoration Angel on the opponent's turn than a Searing Spear to gain even more value and board presence. Searing Spear looks even worse once you factor in all the relevant creatures that it cannot hit: Loxodon Smiter, Restoration Angel, Frontline Medic boosted by Mayor of Avabruck just to name some. Anything bigger can be taken care of by Selesnya Charm which is why I feel a split between Mizzium Mortars and Selesnya Charm is probably the best setup right now. Personally I'll be trying 4x Mizzium Mortars 3x Selesnya Charm this week with 2 Pillar of Flame on the side.
I feel like Bonfire is not well positioned right now and often times you just have it stuck in your opening hand dying to aggro before you can hard cast it for enough damage. I say with the meta currently being the way they are right now, Mizzium Mortars, Searing Spear and Selesnya Charm are your go to removal spells. Selesnya Charm can either chump block a 2/2 or if they pump their creature with either an enchantment or Ghor-Clan Rampager, you can exile it in response. You may also want to up your land count to 24 lands as well.