Deck:

Mana Base:

Calciform Pools x4
Fungal Reaches x4
Brushland x4
Shivan Reef x4
Dark Depths

You have way too few lands. Remember, unless you’re running Urborg, Dark Depths is NOT a land, since it does not add mana. Then, not only you have quite a small number of lands, but only 8 of them produce colored mana "right away". This is a HUGE problem, when decks tend to be as fast as possible. A single Pithing Needle on Calciform Pools can really wreck your strategy. This varies, but as a rule of thumb, try to pack 22 lands for aggro decks (going to 21 if it has a REALLY low curve, or to 23-24 if it has too many lands that come into play tapped, like Treetop Village) and 25 for control decks (going up to 26 if your deck is mana hungry but has no accelerators, or down to 24 if you have accelerators or the deck runs on a relatively low curve, it just needs to play some big spells every now and then)

Birds of Paradise x4
Soulbright Flamekin x2

You tend to list accelerators with lands, but remember they’re not. This is what causes your decks to run so few lands. Creatures are creatures, lands are much less vulnerable than them, so remember this. Accelerators can be taken into account, as I showed above, but never literally. Also, SOulbright Flamekin is a poor accelerator unless the trample-giving ability is good enough for the deck, it only accelerates from 6 to 8, and that’s already so much mana you won’t need an accelerator anymore in the first place, specially one as vulnerable as a creature. I’d just run Coalition Relic, Prismatic Lens or Mind Stone over him any day for acceleration.

Sorceries/Instants:

Cryptic Command x4
Spell Burst x2
Wrath of God x4
Disintegrate x2

I see another problem. You play Spell Burst, but can’t really ramp up the mana curve fast enough (remember, your "accelerators" die to your own Wrath of God, again being counterproductive, I’d run artifact accelerators over them) to make it good. Then, you run Cryptic Command, but has only 4 reliable sources of blue mana (not counting Birds, ’cause they tend to die as soon as your opponent notices they’re too important to your deck, and the storage lands are WAY too slow), and they require that you take damage each time, so it’s not a very good card to have around. If you want countermagic, run something cheaper/less painful, like Rune Snag.

Creatures:
Vigor x3
Akroma, Angel of Wrath x2
Akroma, Angel of Fury x2
Numot, the Devastator x3
Bogardan Hellkite x4
Brion Stoutarm x2
Kamahl, Pit Fighter x2
Arcanis the Omnipotent x3

Ok, let’s go slowly. YOu have a REALLY low amount of lands, and no "good" acceleration (since you’ll need to cast Wrath of God to stay alive a lot of times, thus killing your own accelerators), for a boatload of expensive creatures. This kind of build, even if more aggro-oriented, would need AT LEAST 24 lands. Then, you have 2 HUGE beaters in Akroma, Angel of Wrath. I wouldn’t run the red Akroma, as a LOT of decks are packing black removal, but since I can see her being mindly useful, perhaps keep 1. I like Hellkite here, but not Numot. He makes you tap out during your own turn, does not win you the game as white Akroma does most of the time, or like Red Akroma does against control decks (I’d keep the second in the sideboard), and is WAY too vulnerable to spot-removal, so I’d cut him right out. For the same combination of colors, you’d be better off running a set of Lightning Angels. Also, even though Hellkite comes at instant speed, I still doesn’t like him enough to make into the deck, since, well, you need to cut stuff to make room for land anyway. Vigor is one of the worst incarnations, and Brion is a win-more card in this deck, I don’t see you hurling too many stuff. You probably just wanted the lifelink, but it’s not that necessary. Arcanis will never hit play, so I’d run Teferi in his place (if HE doesn’t hit play, at least they tapped out, so the NEXT beater WILL hit play, otherwise, they can’t counter your stuff anymore until Teferi dies, so win-win card). Kamahl is just terrible.

Planeswalker:
Ajani Goldmane x2
Jace Beleren x2

I don’t think Ajani is suited for a control-ish kind of deck, so I’d leave him out. Jace is cool, but he’s more of a complementary card drawing engine against other control decks, sicne if you play him against aggro, you’ll draw 1 card and he’ll be dead, so I’d leave 3 Jaces in the sideboard, none in the maindeck. You should have better card-drawing options, like Tidings, Foresee, Mulldrifter, Careful Consideration, Ancestral Vision, etc.

Sideboard:

Vigor
Dolmen Gate x2
Soulbright Flamekin x2
Pestermite x 4
Oblivion Ring x 3
Brigid, Hero of Kinsbaile x2
Disintegrate

I’d rather we finish working on the main deck, to THEN check the sideboard