MTG Salvation

Hi all. I already make a post but he's been lost beyond reach. I propose here to work on a build for Xantcha. Seem really have potential, and she's have a very original design.

First, my decklist;
https://www.mtgvault.com/deckbuilderthesecond/decks/xantcha-agent-of-riot/

And now the strategie. I have build it in a very aggressive direction, where we want to deals a lots of damage in a short time. I added some goodies for make Xantcha more difficult to die, and some discard too.
But some problem have appears. First, players dont really use xantcha abilities. Second, the deck is slow, and the Xantcha's buff card are often dead card. And third, the worst, the sacrifice. That really annoying, cause I dont find no answer to that, and card like Dictate of Erebosruin all the fun.

So I need your help to find the best ways to make this commander reliable. Here's we go!

Here's the decklist I'm currently using. My strategy is to make Xantcha unblockable and do 4 damage to all creatures alot. Nim deathmantle can help with opponent sac outlets unless they are freely repeatable.

1 Firefright Mage
1 Soulbright Flamekin
1 Suspicious Bookcase
1 Aether Membrane
1 Burnished Hart
1 Ophiomancer
1 Erebos, God of the Dead
1 Fumiko the Lowblood
1 Kazuul, Tyrant of the Cliffs
1 Neheb, the Eternal
1 Ogre Slumlord
1 Stuffy Doll
1 Wrecking Ogre
1 Crater Hellion
1 Dread
1 Endbringer
1 Angrath, the Flame-Chained
1 Breath of Darigaaz
1 Brute Strength
1 Cabal Ritual
1 Fury Charm
1 Mizzium Mortars
1 Psychotic Fury
1 Run Amok
1 Temur Battle Rage
1 Terminate
1 Fire Covenant
1 Sudden Spoiling
1 Languish
1 Mana Geyser
1 Slice and Dice
1 Sewers of Estark
1 Wildfire
1 Kindred Dominance
1 Lavaball Trap
1 Blasphemous Act
1 Everflowing Chalice
1 Sol Ring
1 Wayfarer's Bauble
1 Fellwar Stone
1 Key to the City
1 Mind Stone
1 Nim Deathmantle
1 Talisman of Indulgence
1 Thaumatic Compass
1 Thought Vessel
1 Crawlspace
1 Worn Powerstone
1 Power Matrix
1 Gilded Lotus
1 Bloodchief Ascension
1 Bitterblossom
1 Vow of Lightning
1 Vow of Malice
1 War Cadence
1 No Mercy
1 Pestilence
1 Phyrexian Scriptures
1 Pyrohemia
1 War's Toll
1 Black Market
1 Exquisite Blood
1 Ancient Tomb
1 Blood Crypt
1 Bloodfell Caves
1 Bojuka Bog
1 Canyon Slough
1 Command Tower
1 Dragonskull Summit
1 Evolving Wilds
1 Graven Cairns
1 High Market
1 Lavaclaw Reaches
1 Maze of Ith
6 Mountain
1 Myriad Landscape
1 Nykthos, Shrine to Nyx
1 Opal Palace
1 Rakdos Carnarium
1 Rogue's Passage
1 Shizo, Death's Storehouse
1 Smoldering Marsh
1 Strip Mine
5 Swamp
1 Temple of Malice
1 Temple of the False God
1 Terramorphic Expanse
1 Urborg, Tomb of Yawgmoth
1 Vivid Crag
1 Vivid Marsh

I feel Xantcha needs discard, this forces people to use her ability.

Here's my list - https://tappedout.net/mtg-decks/10-09-18-apl-xantcha-sleeper-agent/

The way you're playing it, I think Underworld Dreams and some discard would be nice. (Maybe Liliana's Caress?) You could also use Exquisite Blood to gain life as they lose life. (Which of course suggests a combo.)

Needs moar red instants to properly take advantage of Braid of Fire.

You could use goad and Threaten effects to go Voltron.