Satsuki Combo Theory from Fang

BNB's

Condition	Notation	Notes
Meterless Corner to Corner BNB
Anywhere, Any Starter	(5A > 5B > 5C)/2C > 3C > 623[A] , j.8/9[C] > sdj9.[C], land (2[C]) 2C > 3C > 623[A], 421A/623A	Meterless BNB, gives corner carry anywhere on screen. Damage is largely influenced by starter, 5C > 3C does substantially more damage as 2C guts proration. 2[C] , 2C is not possible unless second j.[C] puts opp directly in the corner. 421X ender gives poor oki but creates a safejump opportunity. Opt for 623A here.
Metered Corner Oki BNB
Anywhere, Any Starter, One Bar	Starter > 623[A], j.8[C] > sdj.[C], land 2[C], (5AA)/(5B)/(5B > 5[C] > delay) > 623[B], OTG > 623C	Standard BNB with 623[B] extension. OTG sequence dictates size of gap from 623C. I will go over OTG variations later, OTG 5B > 2C > 623C works universally in the corner and gives the best damage.
Meterless Side Switch 421B BNB
Cornered - Before Midscreen, Normal Starter	Starter > 2C > 3C > 623[A], j.8[C] > dj9 > wait > dl j.[C], land 66 > 2C , 3C, 623[A]/ 5B > 421B	Creates a side swap into 421B Oki.
Second J.C must be delayed until right before opponent hits the ground.
2C > 3C > 623[A] extension creates more corner carry, allowing for cornered 421B sandoori if spaced correctly. 5B > 421B is a more universal option that works on characters with weird hitboxes like Hime and Nero as well as characters that are hard to 2C like Ryougi. Route does not work with only 2C as a starter. Go for this after hitting crossup in the corner.

ENDERS

Ender	Example Route	Notes
421X	…2C > 3C > 623[A] > 421X	BNB Ender, gives HKD and a safejump from anwhere on the screen.
623A	…2C > 3C > 623[A] > dl.623A OR Dropping v.s. Kouma/Ries.	Same conditions as 421B, 623[A] 623A delay is character specific. If you arent confident its fine to omit the 623[A]. Sideswaps into Midscreen oki.
623[A]	…3C > 623[A] > sj.9[C] > j.7[C] > dl. 5[C] > dl623[A] OR
…land 2[C], (5AA)/(5B)/(5B > 5[C] > delay) > 623[B], OTG > 623C > (microwalk) 2B > 623[A]	Creates a 4 way with character and position dependant routes in the corner. Can be set up with or without a gap after 623C which is helpful for hard to safejump slow wakeup character matchups.
623[B]	…land 2[C], (5AA)/(5B)/(5B > 5[C] > delay) > 623[B], OTG > 623C > 66~2C > 623[B]	Useful for slow wakeup characters, sandoori > meaty bite, and some extremely niche/gimmicky setups. Notable for creating an autotimed safejump on hime and arc.
623C	land 2[C], (5AA)/(5B)/(5B > 5[C] > delay) > 623[B], OTG > 623C	The classic. OTG pulls opp out of the corner for a 4 way mixup
214C	land 2[C], (5AA)/(5B)/(5B > 5[C] > delay) > 623[B], OTG > 214C >(microwalk) 2C	Like 623C but trades some damage for some interesting mixup options. Microwalking even one frame before the 2C will closes the corner gap for a safejump/two way mixup. Dont walk for a 3 way.

OTG

5C/5[C]	Highest possible damage OTG, variable OTG windows mean this can either be as easy as 5B, as hard as 1f, or impossible. Only possible at hitcounts lower than 6.
5B	Recommended pickup for midscreen OTG situations under 6 hits like 623B, 236B
22B	Works midscreen under 6 hits, less damage than other options. Doesn’t move Satsuki at all, making this useful for certain oki setups in the corner and converting into BH > AAD.
5B 2C	Standard corner OTG pickup, highest damage option. Use this one.
5A 5B 2C	Pulls opp out of the corner slightly more for a bit less damage than 5B 2C. Useful for confirming in certain situations.
5AA 5B 2C	Pulls the furthest out of the corner while still keeping 623C relaunch. Extra gap makes 66~8 drift a bit easier. Sets up into 623C > 2B > 623[A] for smallest possible gap. Drops unless directly in the corner.
5AA(AAA) 5B (2B) 2C	Longest universal corner OTG string. Good for building just a little more meter before relaunch. Only allows for 214C ender. Pushback allows for 2C> 236[A] tech trap. On talls and Aoko you can microwalk forward before the 5AA for up to three additional 5A hits making a 22B~22C tech trap cover all techs.

Optimization notes:

5B 2B 5C 3C is your highest damage ground chain off of 2/5A or a jump in.This starter removes the need to delay 623[A] for Kouma and Ries. Drops in the corner
If you do not want to spend the meter hit confirming CH 2C(1) with 236C you can use 3[c] instead. 3[c] launch gives enough time for a hop letting you switch sides if needed.
Point blank SC > 2C > 3C confirms will often result in 3C sliding under certain characters like Arc, Nana, Tohno, Hisui, Warc, etc. This can be confirmed with OTG > metered relaunch or backwards hitting 22A > 421A for a meterless option. Backwards 22A > 5B can tack on a lot of damage but it is a one frame link off of deep delay 22A.
2B, 5B, and j.C all combo into themselves on counterhit which can lead to some insane damage. j.C requires an iad or iabd.
Highest damage CH 2B and 5B and j.C counterhit confirm involves cancelling the CH normal into 5[C] for an otg relaunch route. This is usually very difficult to confirm as 5[C] will not confirm on CH. To make this easier you can half charge 5[C] in CH fishing situations like 236[B] > 2/5B these will combo into uncharged 5C anyways. Makes for a great CH punish for things like blocked EX Halo.
You can get 3 j.[C] dunks off in a combo by delaying j.[C] off of a CH 3[C] or 623[A] starter. There is enough height and untech that you don't need to consume your jump cancel. More dunks can be added by catching deep delay j.[C] dunks with a land 2/5A stopping the dunk from adding to the bounce limit but at the time of this writing this has no consistent practical application.
22C hits during 22B 22C pressure resets can be picked up with 623[B] or GAT for a hkd.
You can access meterless 421A ender from 623[B] OTG on characters with a large enough hurtbox (Nero, Kouma, Wara, Aoko, Ciel). Opting for this ender off of 5B > 5[c] corner extensions can add a solid chunk of free damage for no downside. Good option if you are trying to eek out those last few percents of meter for 623C oki but fail to build enough in time.