(L' U' R' B, D2 R U' F2 U2 R) // 10 2c4
F L U, (B2 R U2 L2 B R2 B) // 10 2c3 but 6e
U L (F2 R, U B) B U B // 9 0c3
F L U, F2 B L' B' D2 B L2 B // 11 2c3

(R) R'
U F R2 D2 L2 B2 D' F // 10 4a2
L2 U (F2 R2 B2 R2 D)
(F2 B2 D2 B2 L2 D2 R2) // 24 slice +0

(B2 D' L' U)
(D2 F2 R' L2 F2 R' F) // 11 4b2
L2 U2 L (U2 D2 L')
(F2 U2 R2 U2 B2) // 22 solved

L (B L D R, F2 U D' B2 U' B) // 11 2c3 var

(B R2 F L)
(F' U' F2 D B' D2 F) // 11 2c4
(B2 D L2 U' R2 U R2 U)
(F2 D2 B2) // 22 slice +1

B R' F R L
B F2 D' F D2 F // 10 2c3
(U) U2 L2 U B2 U'
L2 D2 L2 F2 L2 F2 // slice 23 +0

B' F R' B2 L, F2 B D F // 9 2c3 with +1 var from eo and four 10-12 4a1s from extension

(B2 D2 L2 D)
(R L2 B R L' F) // 10 2c4
R (U2 L' D2 L D2 L)
(F2 U2 L2 D2) // 21 solved

very rushed bc I had the 9-move variant of this plus two other 9 2c4, two other 10 2c4, 11 2c4, and 10 4b2
couple 20s available but this was a lot to check idk

couple 23 to slice but nothing better

(R') U' R, U R2 U2 F2 U B // 9 4a3 var but the bad 4a setup
(R U' B), R D2 R2 U R U2 R // 10 2c4
(R U' B'), L' U (R2 L2 D L D) // 10 4b3
L' U' L' F', D R U2 D' R' D2 L // 10 4b2 4e
(U F B2 D, L' B2 R' U2 R B) // 10 4b2 4e

(B) B D2 F'
B2 U B2 U2 D L // 10 4b2
U R2 L2 U F2 U' F2 U
B2 L2 U2 F2 U2 F2 // 24 solved
hoping I could leave 4x and insert in the eo but nope
missed 22 from the 15-move htr which I did check

21 from my other dr but requires good time management
(B) F L2 B
(D) U R2 D L2 D // 10 4a1

exhausting

L' D' L'
(B') D L2 F' L2 F' // 9 2c4
D' (L2 U L2 F2 U B2 D')
(R2 B2) // 19 slice +0

so much else cbf
edit: very happy to tie mallard on such a hectic scram with what seems to be the only easy sub-20

horrible attempt quality but saved by miracle 2c3

(F' L' R' U)
(B L' F2 R' F' R2 F) // 11 2c3
(L F2 D2 R U2 R')
(U2 F2 U2 F2) // 21 solved

U' L' B D F
U' L2 U F2 D R // 11 2c4
D (L2 D L2 U B2 R2 U) // hmm looks close
(U' R2 U2 R2 L2 U2 R2 U L2) // slice 24 +1
24 available but 2 switch 2 or 6q

also had the horrible 8 to 4a2 2e and 9 4b3 I didn't find anything from

U' R (D' L)
(B U D) F2 R2 D' F2 D // 12 4b2

U' R (D' L)
(F') F2 R2 D' F2 U' F' B // shift, 12 4b2
U B2 D // 15 htr
L2 D2 L2 F2 R2 D2 // 21 S slice +2

found the 10+2 too late

B R' B2 L'
U' D2 L2 D' F2 U' F' // 11 4b2
B2 D' R2 D'
L2 F2 R2 B2 // 19 slice +1

B' U2 D' F
R U2 R' L' U' R' U' // 11 0c0
R' U2 B2 D2 L
F2 R2 F B U2 B F' // solved 23

4a1 is the worst subset change my mind

(D2 R F' B')
(R U2 R' L U) // 9 2c4
D2 R B2 R D2 R' D2 F2 R
F2 D2 B2 R2 // 22 slice +1

D2 F D'
(F' L D2 B R' F') // 9 4b2
(R' D2 B2 D2 B2 L)
(U2 L2 U2 R2 B2 D2 B2) // 22 slice +2

why is every single dr on this scramble hot trash

(F L' U F)
(D') L2 B2 U' B2 U // 10 2c4
R (R F2 L B2 L')
(D2 R2 U2 F2 U2 D2) // slice 22 +1

even when the cool dr is good it's bad

(L U2 F')
(D R U' R' L D) // 9 4b2
D2 F2 U2 R D2 L
D2 B2 L2 U2 B2 U2 F2 // slice 22 +2

missed reasonable 23 from this dr and unreasonable-for-me 22
also spent time on the 10-move slice variant which has hard 23s

(L U2 F) B2 U' R' F2 L U2 L U // 11 2c3

U2 R' (R2 U2 L)
(B' [U' D B U' B]) // 11 4b2
U' F2 R2 D'
R2 F2 D2 F2 L2 // 20 slice +2

I wrote one 2+3 and it was this one.
of the two obvious 4q sols on inv, I tried one, the other gives 21, or you can do this trick to get a different slice that +0s:
[] = (R2 U D' F' U' F)

(B R2 L B)
R2 D (L' R U L' U) // 11 2c3 optically good, actually vile