MTG Power Cube:
Good LED Breach BrainSTORM deck, with funy Hexmage Dark Depths back up, into Lorus back up fore Breach or Hexmage.
Choises:
I tryed Hexmage combo and Animate Dead over Bob, Counterspell, Seething Song and Nights Wisper because:
Bob:
Most player tech against the weenie Decks with a lot of spotremovel, Hexmage does his job immediately and Bat just stalls the game and will allways 1v1
Counterspell:
Doubble blue fore protection on combo turn seems unreal, keeping the mana up with just a few Instants seems bad as well.
Seething Song:
The deck needs 4 Mana to go off and one have to be U so it just helpes puting Lurus into hand or gambling on a good wheel of fortune
Hymn to Tourach vs Nights Wisper:
Not sure about it, both are bad with weel of fortune (fore card falue). than its the dubble B against the 2 live. But early Hymn will maybe leed my opent to misread my Deck...and turm 1 Hymn with the Mox Or Ritule and Dures/Inquisition will demoralize most opponents.
More consideration Nights Wisper ofer Bats:
Maybe Bob argument hits the Bat as well and Nights Wisper will give me 2 more looks. But again Bat could mislead the Opent frome reading the deck and could be replayed with Lorus otherwise the would just interact with Hexmage fore killing Planswalker, Spellbomb 2mana Draw, Cromatic Star 1man Draw, LED/Breach Backup. Man i wished i had take the bubble...
Biggest threat is the clock on MTG Arena! Last time i draftet LED Breach i lost 2 games against the clock so, i need more Brain apm.
Game 1:
Against some green value openent, he wasent fast and i could took my time to finish him.
Game 2:
Opent had good Tezeret fore Urza Land on turn 2 i had the choice fore kill planswarker or token diceced to kill the Tezzret, the big construkts killed me on turn 5...
Game 3:
U/W controll, i had him on 3 cards on turn 4 rdy to go off, he has fow, land and unknown in hand and 4 lands in play, i went fore it he had the second blue to pitsh i picked up lorus and repetet and this time he was out of counter game.
Game 4:
Against GWR, his turn one was just fetsh and i fealt happy, but than the party was starting with figute of desteny, Ignoble Hierach mox anstetreal, i killed the creatures probed him and saw endurence, swords spellbinder and some fatties in hand. After i finished with the anti GY stuff i tryed to entombed fore brainstorm cose o had breach in hand and just 10 cards left in deck, he pulled the Daze outand killed me on point with 1 point frome Wrenn and Six.
Game 5:
i mull to 6 keep misty Rainforest (can just finde thundering falls and island) and thundering falls, hymmn Hexmage, Perodin and bitter triumph. opent on the play with U/W surveil land. I play falls seeing fire covernant, milled it cose i was trying to finde my black fore the two dubble black cards. oppent wasent on U/W controll. He was on UW beet down and my only sweper was gone. Hexmage with his first strike and Lurus were no matsh fore his air force. Wandering Emperer sealed the deal with exiling Lorus and outgrowing his weenis against my first striker. not to mention that i sawe my dubble black mana but only a dures as a spell against his empty hand :>.
conclusion:
2-3 is not the result that Deck deserved, i pioletet porly, the deck presentet often the right answer but i missjudged the situation. 
Throw away the Fire Covernant, run into Daze etc. 
Nights Wisper over Hymn would have been better dubble black was pain, never saw the depths but in the games i lost it wouldn't have helped cose exil or bounce removle, amd cuting my spot removel fore a second sweaper would have been nice, trading one fore one wasent buying the time that i was expecting and against the super big guys it with ther mighty cip efects it hadent neither.
At least i was faster than the cloack in the go off turns, so i am exitet to draft breach combo again it seems open often enough.