Inspiration:

https://www.mtgtop8.com/compare?l=_312191_311168_310818_309732_310103_309742_309765_308814_309093_308408_308409_308418_308387_308391_308256_308013_307727_307736_307743_307751_307756_307652_306047_312565_311976_311985_311596_309910_

7 - 8 burn spells (4 Harnessed Lightning, Magma Spray, Abrade, Lightning Strike (Negate, Essence Scatter))
8 - 9 top-end (Bristling Hydra, Glorybringer, The Scarab God, Vraska, Relic Seeker, Nicol Bolas, God Pharaoh, Confiscation Coup, Commit // Memory (Nissa, Steward of Elements, Vizier of Many Faces))
21 - 23 creatures (16 = 4 Longtusk Cub, 4 Servant of the Conduit, 4 Rogue Refiner, 4 Whirler Virtuoso / 6 = 2 Bristling Hydra, 2 Glorybringer, 2 The Scarab God)
3 - 5 planeswalkers (2 Chandra, Torch of Defiance, Vraska, Relic Seeker, Nicol Bolas, God Pharaoh (Nissa, Steward of Elements, Nissa, Vital Force)
22 lands

Sideboarding:

https://www.channelfireball.com/all-strategy/articles/hail-to-the-true-scarab-god-sideboarding-with-4c-energy/

Mana Symbol Requirements

(https://strategy.channelfireball.com/all-strategy/mtg/channelmagic-articles/how-many-colored-mana-sources-do-you-need-to-consistently-cast-your-spells-a-guilds-of-ravnica-update/)
(http://www.channelfireball.com/wp-content/uploads/2018/10/How-many-sources-60-cards.png)
Goal: Cast any card with cmc N on curve with a probability of 89% + 1% * N.

Land Mana Symbols:

22 Lands

3 green only land sources
1 blue only land sources
2 red only land sources
1 black only land source
0 colorless land sources

4 any color source
4 green + blue land sources
4 green + red land sources
3 blue + red land sources
0 green + black land source
0 blue + black land source

= 15 green sources (+ 4 on turn 2 | + 2 on turn 3)
= 12 blue sources (+ 4 on turn 2 | + 2 on turn 3)
= 13 red sources (+ 4 on turn 2 | + 2 on turn 3)
= 1 black source (+ 4 on turn 2 | + 2 on turn 3)

= 19 green or blue sources (+ 4 on turn 2 | + 2 on turn 3)
= 20 green or red sources (+ 4 on turn 2 | + 2 on turn 3)
= 18 blue or red sources (+ 4 on turn 2 | + 2 on turn 3)
= 16 green or black sources (+ 4 on turn 2 | + 2 on turn 3)
= 13 blue or black sources (+ 4 on turn 2 | + 2 on turn 3)

+ 4 Attune with Aether. They can be counted as + 1,0 * 4 mana sources of either color for cards with cmc 2 or higher. Though they act like a tap land.
+ 4 Servant of the Conduit (which are irrelevant on turns 1 & 2). They can be counted as + 0,5 * 4 mana sources of either color for cards with cmc 3 or higher. Though they act like a tap land.

Conclusion

We rely on Attune with Aether to sculpt our mana sources from turn 2 onward, though it basically acts like a tap land and can only fetch up to 1 blue and 2 red sources.
Not being able to cast Glorybringer for 3RR on turn 4 or 5 could be a disaster: Relying sorely on lands, there is a probability of 92,4% to cast it on turn 5. Attune with Aether & Servant of the Conduit raise that value to 99,9%.
Casting a turn 2 Negate or Essence Scatter will be possible in 90,1% of cases if you account for lands only. Attune with Aether raises this value to 97,0%.