turn one, mountain (six cards in hand)
turn two, mountain, ash zealot, swing for 2 (5 cards in hand)
turn three, nykthos, burning tree emissary, purphoros, swing for 2 (3 cards in hand)
turn four, burning tree, burning tree, hammer, fanatic of mogis, 6 damage from purphoros triggers, swing for 18, 12 devotion damage from fanatic (0 cards in hand)
total damage 40 if i did the math right
turn one, mountain
turn two, mountain
turn three, nykthos, burning tree emissary, burning tree emissary, burning tree emissary, burning tree emissary Hammer of Purphoros, Fanatic of Mogis : swing for 14 + 11 from Fanatic trigger
turn four, Fanatic of Mogis: swing for 18 + 12 from fanatic trigger
magical christmas land here of course but that's 55 damage by turn four, your opponent normally already being dead on turn three
remove a burning tree emissary from turn three and put an ash zealot on turn two for 2 extra damage?
Back when Theros first came out, I played a RDW list similar to the one in the OP. This was before everyone started played Mono-black, Blue/white/x control, and g/r/x monsters. Those days, it would not be uncommon for me to have a game that results in the following. Turn 1 Rakdos Cackler. Turn 2 Ash Zealot, swing for 4. Turn 3 Boros Reckoner, swing for another 4. Turn 4 Fanatic of Mogis, deal 7 directly. Then swing for 6. So that would be a total 4+4+7+6=21 damage by turn 4.
4 ash zealot
4 burning-tree emissary
2 frostburn weird
4 boros reckoner
3 purphoros, god of the forge
4 fanatic of mogis
3 stormbreath dragon
4 magma jet
2 mizzium mortars
2 hammer of purphoros
2 chandra, pyromaster
Land: 26
4 temple of triumph
4 sacred foundry
4 nykthos, shrine to nyx
14 mountain
turn two, mountain, ash zealot, swing for 2 (5 cards in hand)
turn three, nykthos, burning tree emissary, purphoros, swing for 2 (3 cards in hand)
turn four, burning tree, burning tree, hammer, fanatic of mogis, 6 damage from purphoros triggers, swing for 18, 12 devotion damage from fanatic (0 cards in hand)
total damage 40 if i did the math right
remove a burning tree emissary from turn three and put an ash zealot on turn two for 2 extra damage?
t1: mountain, legion loyalist 1 dmg
t2: mountain ash zealot 3dmg
t3: nykthos, burning tree, burning tree, tap nykthos,reckoner, fanatic 11dmg without swing
t4: mountain,tap mountains and nykthos for 12 stormbreath, monstrosity game
T1: Mountain
T2: Mountain, Zealot (2 damage)
T3: BTE, BTE, BTE, Nykthos (activate for 8), Hammer, Fanatic (11 damage), swing for 12 more damage.
So, 23 on turn 3.
2: mountain, Ash zealot, swing 3
3: shrine to Nyx,boros reckoner, swing 3
4: mountain, Chandra's phoenix, thunderous might x2. Swing 22 in the air. 6 on ground.
Done this multiple times in standard.