first I found:

B' L
D'
F' D B' L2 F2 U//cool DR in 9 but bad corners

then I noticed the 3 move extension has the same arrangement of pieces so:

R2 B' L
D' F' D B' L2 F2 U//2c3 (10)
(D2 B' R2 U2 F' R2 F')
(B2 R2)//19

Final: R2 B' L D' F' D B' L2 F2 U R2 B2 F R2 F R2 U2 B D2

other:

B' L'
D' B2 F D B U' B D//4c3 (10)

B' L
(F U) F' L2 R2 F U//4c3 (9)

F R F' B L'
F2 D2 F U F//4b2 (10)
B2 D2 R2 F2 D R2 D'
L2 D2 B2 L2//solve (21)

Final: F R F' B L' F2 D2 F U F B2 D2 R2 F2 D R2 D' L2 D2 B2 L2

nice linear

other:

(R') R U' L
(U) F2 D2 F U' F2 U//4b2 (11)

(R2 U D B' D)
L2 F2 R U2 F//4b2, this one also has 4ht trigger 4ht 21 but I didn't find it (10)

(U) U' R U
L F' R2 B' U2 F2 R//4b2 (11)

(B) D F2 D F'
(L2 D2 R D)//4b2 (9)
[L' D2 L F2 R U2 D2 L]
F2 U D L2 U D//M slice (21)

[]->R' B2 L D2 R F2 B2 R (21)

Final: D F2 D F' R' B2 L D2 R F2 B2 R F2 U D L2 U R' D2 L2 B'

why does a 4b2 2e need this kind of htr + double slice to get optimal...

other:

L2 F' D B L
D R2 F2 D2 F//4b2 (10)

(D F2 L)
(D2 F' L2 B D)//2c5, would have tried this seriously if the corners weren't in the most doomed position ever

L' (L' R U' B2 R)//erm
U' D F' B' D//4a1 (11)
(B' U2 R2 U2 F L2 F)
(U' D L2 U D')//solve (22)

Final: L' U' D F' B' D2 U' L2 D' U F' L2 F' U2 R2 U2 B R' B2 U R' L

Instead of switching every 5 mover I decided to do 6 move eos for some reason, and I knew L was quite worth the switch because i get to check like 20+ 6 movers for one switch.

At first I ignored this 11 move DR because the 4a1 cases were trash on both sides.

From this EO I also had 14 to HTR:

L (L' R U' B2 R')
(U D F' B' U2 R2 D')
(B)

I spent almost all the time on this and some DR flipping stuff but they all didn't seem to work. At 50 mins I decided to do a desperate 3q solutions on the 11 move DR and amazingly it gave 22 without the need to do any leave slice

I also found a 20 to S that I didn't have time to fully write out and slice, but 'luckily' it couldnt beat 22 anyway

L' (L' R U' B2 R)
U' D F' B' D'
(B D2 L2 D2 F' R2 F')
(U2 y2)//4x + S in 19, you can 8-7 the 4x to get S in 20

R' (R F R)
(U' R2 B D' F' U)//2c3 (10)
L2 F' (F' R2 D2 B)
(U2 R2 F2 D2)//S slice (20)

R' L2 [F' D2 F2 R2 U2 B'] D2 R2 F...

[]->F2 B R2 B2 D2 R2 F' (21)

Final: R' L2 F2 B R2 B2 D2 R2 F' D2 R2 F U' F D B' R2 U R' F' R'

I had a DR with 20 potential but missed it:

L2 F2 R'
(U) D L2 F D' B' U//2c3 found via premove abuse

if you use the EO variation it gives the same DR and it's 20 opt, but when I tried it I must have mis-undid something because I remember the case wasn't preserved as 6 moves to DR, oh well

U (U F' R' D)
R' U2 F' B2 R//0c0 4e (10)
D2 F R2 L2 B'
U' D L2 R2 U' D//lol (19)

Final: U R' U2 F' B2 R D2 F R2 L2 B' U' D L2 R2 U' R F U'

you can actually get 18 by doing the 0c0 trigger before the moves to DR:

U (U F' R' D)
F' L2 R2 B//???
R' D2 F2 B' R
U D L2 R2 U' D//18, also the optimal for the scramble

but I would never have thought of that.

I didn't have anything else on the scramble because this was the first group of EOs I checked, literally had a 19 in 10 mins and I quit the attempt at 25

(D2 L D B')
(U' R' U' L' D L')//2c3 (10)
F2 [D' L2 D' L2 D] B2//2e + E (17)

[]->U' F2 U R2 D2 L2 U2 D (20)

Final: F2 U' F2 U R2 D2 L2 U2 D B2 L D' L U R U B D' L' D2

optimal after EO :)

other:

(L D B)
(R U' F2 D2 R' D2 L)//4c3 (10)
F2 U (F2 U2 F2 U' F2 U')
(R2 D2 L2 B2)//backup 22

D R B L D
(F' B U2 F' L)//4a1 4e (10)

D' (D2 B2 D)
(R B' F2 L U2 F)//2c4 (10)
F2 R (U2 R' F2 D2 L B2 L)
(F2 R2 D2)//solve (22)

Final: D' F2 R D2 R2 F2 L' B2 L' D2 F2 R U2 F' U2 L' F2 B R' D' B2 D2

ew scramble 

other:

(F) D U2 B'
L' U L' B2 L2 U//4c3 (10)

(F' R' D L F)
(B2 L D' L D L)//4b2 (11)

D' F L U2 B
U R U L U//4c3 (10)

F U2 L D B'
R2 F2 U R U' L//4b2 (11)

(D B2 L2 F')
(U' R2 U2 B2 D L)//4b2 (10)

(R2 U' R2 F2 D)//HTR, looks like one of those cases that becomes good after a 2e2e insertion, so let's restructure

(R2 U') B2 L2 F2 D
B2 L2 U2 B2 D2//solve (21)

Final: B2 L2 F2 D B2 L2 U2 B2 D2 U R2 L' D' B2 U2 R2 U F L2 B2 D'

I love this trick

other:

(D B2 L2 F)
F2 D B2 U R//4b2 (9)

U D2 L
B' U B D L2 F2 D'//4a2 (10)

U D2 L
(D' F' B' L2 D F D)//2c3 (10)

L' U B D
(D2 B' R2 F D2 R)//4b2 (10)

B2 D B' L'
F' R2 D' {U2 F}//2c3 (9)
(R2 [U' L2 U F2 U])
(L2 R2)//2e + E (17)

{}->F2 D2 B2 D2 F'

[]->(D' B2 U L2 D) (20)

Final: B2 D B' L' F' R2 D' F2 D2 B2 D2 F' L2 R2 D' L2 U' B2 D R2

solving the 2e within the DR itself gives a 19 to slice that is +2 lol

After B2 D B' there is exactly 1 way to get 20 which is this :)

other:

(F' U D' R')
(B U2 F' D2 F)//2c4

(F' D' L2 U R)
(F2 L2 U2 B' U)//2c3

B' D2 B2 L
(F' R2 F2 U B)//2c4

(D B2 R F')
(D) B2 L2 U L2 U//2c3 (10)
(B2 L B2 L' F2 L)
(B2 U2 R2)//E slice (19)

B2 L2 [U L2 U R2 U2 B2] L'...

[]->D F2 D U2 F2 D2 R2 U2 (21)

Final: B2 L2 D F2 D U2 F2 D2 R2 U2 L' F2 L B2 L' B2 D' F R' B2 D'

other:

(L R2 U' R2 D)
(R2 F2 R U2 B)//4b2

(L) R' F' D2 R
U R2 U B//2c4

U2 D2 R' B
(L) U2 R2 B2 U2 B2 R//2c3