D' B R2 U//EO(4)
L2 F2 R B' L F//DR(10) 4a1 8e
L (U2 B2 R U2 D2 L)//HTR(17)
(U2 F2 D2 F2 R2)//Solved(22)

This is not sliceable to 21

R D2 L B//EO
U R2 B2 L2 R' U//DR(10) 4b2 4e
(R L2 D U2 R D2 R)//HTR(7/17)
(L2 B2 L2 B2 U2)//E Slice(5-1/21)

R D2 ..... [U' B2 L2] B2 L2....R'

[D' R2 B2 U' D]//Solved(23)

Had 22 to S Slice but no+0
U2 R (L D2 R U2 R')//HTR(16)
(B2 F2 U2 F2 L2 U2)//Slice 22

R'( L D L)//EO(4)
U2 B U2 R2 F2 D'//DR(10) 4b2 0e
[F(L2 F2 R2 D2 B])//HTR(6-1/15)
(F2 R2 U2 L2 D2)//Slice(20)

[B R2 D2 L2 U2 B2 F']//Solved(20)

(L') F B U' L'//EO(5)
D//JZP,DR-2c2e
(U B2 U R2 F2 D)//DR(12) 2c3 4e
F(D2 R2 F' R2 F)//HTR(6-1/17)
([D2 R2 U2] R2 F2)//E slice(5-1/21)

[U' D' F2 U' D']//Solved(23)

Super happy given the scramble, I dealt with a lot of these 2c3 in 12 JZP variants and found this :)

Oof
47 EO's checked
1 sub 12 DR found, 11+5. At 45 I found some variants of 12+2 6e DR, 23 optimal with 4 qt :(

B' U L U2 R//
F D L2 U2 F' L2 F//4b2 6e (12)

(F) U R D' B//EO(5)
L2 D L2 D' R L//DR(11) 4b2 6e
(F2 R2 B2 U B2 [D)//HTR(6-1/16)
(F2 U2]B2 L2 D2 R2)//Slice(6-1/21)

[D2 B2 D U2]//Solved(22)

Super happy using 8e8c, had no good Dr's until these several variatons of this one.
Pretty quickly  got 21 to slice on 2 variants and 22 final. Mallard with my settings gives 22 from these DR

EDIT : Looking at Louis's solution, I realized that I forgot to check this HTR on this variant because on first 2 variants it was bad and the other one gave 21 to E slice :(

(F' L) L B L//EO(5)
(U2 B2 U2 B' D)/DR(10) 2c4
U2 B (L2 D2 B' R2 F' L2 F)//HTR(19)
(D2 R2 F B U2 B F)//Solved(7-2/24)

L B L U2 F' U2 [F' B' R2 D2 F' L2 F] R2 B D2 L2 D' B U2 B2 U2 L' F
[B2 D2 L2 F' U2 B]//Solved(23)

Cool EO, extended HTR, slice finish+ shortening.
I'm happy with the result on a scramble where I had not a lot...
Optimal for DR but a variant in 11 gives 22 ofc

F D2 R//EO(3)
(D' L2 D2 F2 B2 D' B)//DR(10) 4b2 4e
(L2 U' R2 F2 [D)//HTR(15)
F2 U2] B2 L2)//Slice(19)

[(D' U2 B2 D2)]//Solved(20)

What a scramble. I wrote down so many 4/5 movers and the 3 move EO's were stupid : lots of RZP's in 4, even RZP in 3 or AR-0c0e which could lead to a lot of JZP where I lost a lot of my free time :)

22 19 20 is ridiculous 20.33 mo3 where 1 feels like such a fail.
Scrambles were dumb

So that's what a variation hell looks like x)

({R L U D})//EO(4)
F B' D2 B' L//DR(9) 2c3 4e

{R' L' U' D}//Different variation of DR
L2 B U2 R2 F R2 F'//HTR(16)
L2 D2 R2//Finish(19)

It took me a while to get sub 23, had 20 to slice from first variation but +3 optimal (only 2c4e trigger was slicable). But then I had so much things to check...

I got this pretty late because I made up a DR giving slice in 21 that I couldn't find again (probably miss scrambled), but if someone early nissed the EO then probably getting 19 in all of this is pretty easy.

B F' U//EO(3)
(L) F U2 B' F' L2 B L//DR(11) 4a2 4e
F (U2 L2 B')//HTR(15)
(R2 [U2 F2]R2 D2 F2)//E-slice(6-1/20)

[U2 D2 B2 D2]//Solved(22)

I somehow could not see the finish directly (but with F' for HTR it becomes obvious)
It's still ridiculous how long it took me to find the 22 from 20 to slice.
Also had a lot of 22 to S-Slice but with 2qt and 1 ht was very quick to see that no +0

Sadly there's 19 on this RZP on a complicated 11 move DR

R F' L2 B//EO
R (D' L2 R2 D U2 L)//DR(11) 4b2 4e
(B2 L2 F2 [U' B2 L2 D])//HTR(18)
(B2 L2 D2 L2 F2)//Slice(23)

[U R2 B2 D]//solved(23) 

(R' D) B' R U//EO(5)
(F2 L' R2 F U2 R2 B')//DR(12) 2qt 2e
(L D2 L')//HTR(15)
(D2 L2 U2 B2 R2 B2 U2)//E-Slice(7-1/21)

B' R [U' B2 R2 B2 U2] L2 D2 L D2 L' B R2 U2 F' R2 L F2 D' R
[D' R2 F2 R2 U D]//Solved(22)

Mallard gives no DR in 11 with Eo in 5 RZP in 5.
I mean finding the 11 move DR from 6 move RZP (giving 21) would have been possible if I had less EO's  but I consider this to be risky to look for RZP in 6 when you have 30+ Eo's in 5 waiting for you

(B2 U2 B U')//EO(4)
(B') U2 L B2 R B//DR(10) 2c4
(L) D2 L B2 L' U2 L'//HTR(17)
U2 R2 *U2 *L2//S Slice(4-1/20)

*=F2 B2(4/24)
Could not see the finish directly lol

Sadly optimal also had 0c0 in 10 that of course is 23 optimal but I didn't even try... Maybe I should have

(F B) R F//EO(4)
L' U2 L' F2 D2 R D//4b3 (11)
B2 R' D2 [R (F2 R2] F2 B2 L)//HTR(19)
(D2 F2 B2 L2 B2)//Slice(24)

[L U2 L2 U2 D2 B2 R' F2 B2 L2]//Solved(24)

Had (F U2 L B F2 L U2 D2 R' U)//10 to 0c3 with a variant, 25 optimal :(
Mine is 23 optimal, the only findable ones are with 1qt switch 2qt 4e trigger which I didn't have the time for because of shitty DR in 10

D L2 R B'//EO
(U2 F2 U2 L2 D' L)//2c4 (10)
U F2 D (L2 R2 U' L2 U)//HTR(8-1/17)
([L2 F2 D2] R2 D2)//S slice(5-1/21)

[F2 L2 F2 D2 F2]//Solved(23)
Found the slice solving on normal :) Kind of weird way to find it but I did
Optimal was 22 :(

DNF'd this one :( My 11 to 4b2 4e was a nightmare

F' U L' D' F'
 L2 U' D2 R U2 R//4b2 4e (11)

24 optimal that I could not have found, had probably a 26 to slice but didn't want to submit this

(U B2 F L)//EO(4)
B (L2 U2 B' D B )//DR(6-1/9) 4a3
D F2 D (B2 U2 L2 B2 U)//HTR(8-1/16)
(B2 L2 B2 L2 U' D' R2 U D)//Solved(9-2/23)

At 40 min I had nothing and had noted a ? next to this EO (because a lot of things oriented), so I Randomly switched it and found this 3e2c in 5 giving a lot of things.

Sadly there is a 21 with double slice that I should have found :(

B2 D2 R' D'//EO(4)
F ( L' U2 R' L2 B')//DR(10) 2c4
L (R]) B2 R2 D2 R F2 D2 [L'//HTR(19)
B2 D2 L2 F2//Slice(23)
[R' U2 B2 R2 U2 R2 L]//Solved(24)


I missed
[L2 U2 R B2 U2 R' U2 B2 R2 U2 L']//Solved(23)

HTR is written weird but it actually is how I found it because I was kind of desperate

I found and checked the 3 mover and every 4 mover for RZP in 5, none gave me DR sub 12.
Then I checked 28 5 movers and found nothing more :(

I wrote a 12 4a3 that was bad (26 optimal :( ) so I happily DNF this one

B (U L' F)//EO(4)
D2 F2 U2 L' D L//4a2 4e(10)
B2 U B2 U2 L2 D'//HTR(16)
L2 R2 B2 D2 B2 F2 R2//Finish(23) (found with S slice in 21 but didn't cancel with EO)

A lot of 10 move DR's bud bad subsets and 23 feels like shit on this scramble where I checked for RZP in 4

F2 B' L' D'//EO(4)
F' B//JZP(6)
(B' R2 B)//DR(9) 2c3 2e
R F2 R' F2 R'//HTR(14)
U2 F2 D2 L2 F2 D2 L2//Solved(21)

I first found F2 B' L' D'//EO(4)
F' B//JZP(6)
R F2 R' F2 R'//4b2(11) where I tried non NISS HTR's on several variations. I would have found the same solution on inverse which is funny and quite rare

(U B' R F U)//EO
(F2 B2 R' F2 L B)//DR(11)
(R' B2 L') U2 B2 L//HTR(17)
F2 L2 F2 U2 B2//Slice(22)

(D B' R' L2 D)//EO(5)
(F) R B2 F R' F' //DR(11) 2qt 4e4c
(U2 R]) L B2 U2 R U2 R'//HTR(8/19)
D2 [R2 U2 B2 D2 B2//Slice(25)

[L2 D2 F2 U2 F2 R L2]//Solved(+1/26)

Meh not even +0

(B2 R F D)//EO(4)
(R' L2 B' R2 U2 F L)//DR(11) 3qt 2c4e
B (L2 D2 L2 B D2 B)//HTR(7-1/17)
(D2 L2 D2 B2 L2 D2)//Solved(23)

Optimal is 22 but weird choice of QT of progress that I would not try
Even more true because I also had

(D L F L')
(B) D B2 R2 U B2 D B //12+1 4e4c

Here is the disappointment
(B2 U2 R2 B2 L2 U)//HTR(17)
(L2 U2 B2 R2) slice in 21 but not +1

Just had to do
(B2 U2 R2 B2 L2 U')
(B2 U2 L2 U2 R2)//Solved for 22, I'm so mad I missed that
Optimal for this is also 22

L F B’ U//EO(4)
(F2 L R2 F’ R’)//DR(9)
(F) U2 D2 L2 [B R2 L2 U2 F//HTR(17)
L2 U2 L2 F2] D2 R2//Slice(23)

[B2 F’ U2 D2 L2 B R2 D2 R2 B2]+1 // 24

Missed a 21 on a trigger I checked with U but not with U’
Lots of 21 with U’ so I’m disappointed even though the scramble was bad

(B F L F)//EO(4/4)
L' U' R' U F2 U//DR(6/10) 3qt 2c4e
(L]) F2 D2 F2 L U2 [L'//HTR(7/17)
D2 B2 D2 R2 B2 D2//Slice(23)

[R2 L U2 F2 U2 L R D2 F2 R']//(+2/25)

20 is findable on a HTR path that I didn't check :( :(

L' B2 R' (U2 D2 L)//HTR(6/16)
U2 D2 B2 R2//Solved(20)

The only thing I didn't try that was reasonable so kind of mad (+2 slice ruined the attempt anyway

(F B' D)//EO(3)
F (R' L2 U2 D2 F)//DR(9) 4qt 4c
([L' F2 L] F2 R2 U2 R' B2 R)//HTR(18)
(D2 L2 F2 U2 L2 U2 L2)//Slice(25)

[R' D2 R]//solved(25)

Optimal is 22 with 6qt, a lot of 23 with 6qt but none with 4qt...

Of course had (F B' D R) F' D2 L //DR (7) 4qt 4c but worst corner case ever, could not figure out a short way to HTR, turns out it was +13 so better than mine for a 20.
I wonder if it was findable but without knowing the maze, I'm sure I would not have, maybe if I spent 40 minutes on it but already had the 9+4 and didn't risk it

(U B2 R) // EO(3/3)
(F' D' R2 L2 B' D B' D)//DR(8/11)4qt 2c
R2 B' D2 F U2 [F' U2 F//HTR(8/19)
L2 F2 D2 R2 F2] R2//Slice(25)

[B' R2 B L2 B2 U2 L2 B2]//Solved(+0/25)

Optimal for DR sadly.
Had a bunch of 11+4, and a 12+3 2c2e, but no better DR, even though the scramble looked good

(F D' F')//EO
(U L' U2 L R2 U)//DR(9)2qt 4e
D2 B2 R F2 D2 [L'//HTR(15)
B2 D2] F2 L2 U2//Slice(19)

[R' U2 B2 R L']//21, sadly optimal

There is a 20 with 4q but would not have found it

B R D F' L//EO(5/5)
(R2 B F R2 F' U)//DR(11)
(F' R2 U2 F' D2 F D2 F')//HTR(19)
(R2 U2 L2 B2 D2)//Slice(24)

+2 horrible slice :(

L (F2 B L)//EO
B2 D B2 U B//DR 2qt 4e2c (9)
D (L2 F2 R2 D B2 D' B2 D)//HTR(9/17)
(U2 B2 R' L' D2 R L)//Finish(24)

DR is 21 optimal, 4qt but differently :(

(U^) D B2 L2 U^ B2 U//HTR(16)
F2 D2 F2 L2 B2//Slice(21) 
^w+0

I probably would have found this if the D didn't transform in 3qt 2c2e with 17 HTR and cool finish. Found the DR pretty late and also his evil twin

L' (F2 B L)
D' L2 B2 D B//DR4qt(9)

that I did check a little instead of findinf better than 24...

U R L //EO(3/3)
(D2 F2 L2 U2 B' D B)//DR(7/10)
(D') F2 R2 U' R2 B2 D //HTR(7/17)
F2 L2 F2 B2 U2 R2//Slice(6/23)

+2 for 25 :(

L U R B D'//EO(5/5)
B F L2 B F' L//DR(6/11)
(B' D2 [B L2 F2 L2 U2 F)//HTR(8/19)
(U2 L2 U2 L2 U2 B2])//Slice(6/25)

[F U2 B2 D2 L2 B D2 R2 D2 R2 D2 F2]//Solved(12-12/25)