Link:
https://www.channelfireball.com/all-strategy/articles/standard-mono-red-deck-and-sideboard-guide/?_ga=2.48912623.817337962.1581627230-163380851.1581347577

Math:
1st drop - 80.9%
2nd drop - 96.0%

3 land in 3 turn (play): 63.8%
3 land in 3 turn (draw): 72.2%
4 land in 4 turn (play): 44.1%
4 land in 4 turn (draw): 53.6%

*no Light up the Stage in examples above

Sideboard Guide:
**Temur Reclamation & Simic Ram**
No changes

**U/W / Esper Control**
-4 Torbran, Thane of Red Fell
-4 Runaway Steam-Kin

+4 Unchained Berserker
+4 Tibalt, Rakish lnstigator

**Mono-Red**
-4 Scorch Spitter
-4 Runaway Steam-Kin

+4 Lava Coil
+4 Tibalt, Rakish Instigator

** Jund & RB Cats**
-4 Scorch Spitter
-2 Rimrock Knight
-1 Torbran, Thane of Red Fell

+4 Lava Coil
+3 Embereth Shieldbreaker