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

other
F L' U D B
U' R2 F2 U' D L' // 11 2c3 4e
D' F2 D' R2 B2 D'
B2 R2 B2 // E in 20, +2 opt

DR via 'odd jzp' in 6
F D L' U B, D (U L' U' L' U) // 11 2c3 4e

L D' U' R' U
(F2 R2 D2 B L) // 10 2c4 4e
B U2 [B U2 R2 F R2 F
D2 B2] R2 U2 // S in 22

[]->F R2 D2 F D2 F L2 F' B' // 23
oof

the 0 pairs 3c4e 5 mover ☠️
(F' B2 U' R B)
R D' F2 B2 L // 10 4b2 2e
D' F2 B2 D2 B2 U L2 F2 R2 D2 R2 // 21

R2 L F U 
F (R2 B2 L' R2 D2 L F) // 11 4a1 4e, +1 ext
(B2 R2 D2 R)
(B2 U2 F2 D2 R2 B2) // 22

i was pretty surprised to see mallard not give me any simple sub-22s at first. well i missed this dr

B2 L F (D2 F B) // ext for niss htr
D' B2 D2 L U' L // 11 4b2 2e
U' (R2 D)
(B2 U2 L2 F2 U2 F2) // 21

saw this 3c4e but i didnt know if 1p 21 is worth a switch
(L2 B D2 L')                 // eolr               (4/4)
D2 B' U' R2 D2 F'            // drud-eolr [2c3 4e] (6/10)
B2 D R2 B2 D2 R2 U' R2 U R2  // fin                (10/20)
19% sub-7 according to arm/pairs so maybe so

also kinda missed
B L2 F' D                      // eoud               (4/4)
L F2 L F' B L'                 // drfb-eoud [2c4 6e] (6/10)
F U2 R2 F U2 B' D2 B F2 D2 U2  // fin                (11/21)

first triple 20!!!
U' L U B' D'
L2 U2 B2 D2 B' L // 11 2c3 4e
F R2 F2 R2 B R2 B
U2 R2 // 20

8.67 finish lengths. is there a guide on how to use NISSY to check optimal solution for each step?

swag
(F2 U')
(D2 R') L2 B2 D2 F L F R // 11 4a1 4e
(L2 F') // htr in 13 but its garbage

remove normal
B2 D2 B2 L2 F' R F L // blocky fish 3e for new htr in 14
D2 L2 [D2 B2 L2] // S in 19

[]->B2 L2 F2 U2 F2 // 21 - 1 = 20

and i didnt realize B2 D2 L2 F' R F L was an htr equivalent dr with an easy 7 mover for the htr in 13 lol (also has wrong slice in 17 but +3 opt, phew)

L' D' U2 F U'
B2 R2 F B L F R // 12 4b2
L2 F' L2 F2 D2 L2 F' R2 // 20

a plentiful harvest

other
(R' U2 B D' L')
(R2 F B2 L2 D') // 9 2c3 4e, +1 ext
B (L2 F' R2 F')
(R2 U2 L2 F2 D2) // S in 20, +1 opt

U F D L B
L2 U' R2 B2 D R' // 11 2c3 4e
(D R2 U R2 F2 U')
(R2 L2 F2 R2 U2) // 22

edit: 21.46 ao15 and im currently on track for demotion, lol

D R' F' B
(U' D R L' B2 U' R' U') // 12 4a1 4e
R2 U2 L
U2 F2 L2 B2 U2 B2 // 21

waw

(U' B2 D2 B') // dr equivalent eo
R D B2 L2 U R // 10 4a1 2e (originally 9 4b2)
D F2 D' F2 B2 U
(L2 D2 R2 B2) // E in 20

...U R [D F2 D' F2 B2 U B2 R2 D2] L2...
[]->U L2 D' R2 L2 U R2 F2 U' D' // 21

dr optimal except this is an htr equivalent extension of the 9+2, i did check this for htrs in 15 oof
(B2 D2 B')        
R D' U2 F2 R2 U L' // 10 4b2 4e
U (D' B2 U R2 D)
(R2 B2 L2 B2) // 20

10 sub-10 drs
B' D2 L' B, D L D R // 8 4a2, worst corners
B' D B' R, R2 U2 R2 L2 D' F // 9 2c3
(F2 U2 B, L' U' D2 L' D L) // 9 2c3
(F2 U2 B', R2 F2 R' U2 L' U) // 9 2c3
B' L' D2 B, (L' U F2 L2 U) // 9 2c3
D B2 R, (U' B' D' B' D' B) // 9 4b3
U2 L F2 U, (F2 L' U2 L B) // 9 2c4
(F2 U2 B'), U (R D2 F2 R' D') // 9 2c4
etc

U' (F2 L' B2 U)
(B L2 F2 R U2 F') // 11 2c3 4e
R' (R' D2 F2 L)
(D2 F2 D2 F2) // M in 20

U' [R' F2] D2 F2...
[]->L' U2 R' L // 22 ouch

a2 was unfortunate but ok mean

R (F R')
(D F' B D R2 U' L2 F) // 11 4b2 4e
L2 B2 D F2 L2 F2 R2 [D'
L2 F2 D2] // E in 22

[]->U2 D R2 B2 U2 // 23 oof

tbh shouldve checked NISS rzps, but this finish eh
R (F R)               // eolr               (3/3)
F' (F')               // rzpud-eolr         (2/5)
(B2 L2 D' B)          // drud-eolr [2c4 4e] (4/9)
D R2 U' (L2 D R2 D')  // htr-drud           (7/16)
L2 B2 L2 U2 L2        // fin                (5/21)

other misses
R (F R')                              // eolr               (3/3)
(B' L2 D F' U D2 B')                  // drud-eolr [4a1 4e] (7/10)
(U D2 R2 F2 R2 D' B2 U' F2 L2 D2 B2)  // fin                (12/22)

U (F B2 D)                            // eoud               (4/4)
(F' R' F R F2 L)                      // drfb-eoud [4c3 2e] (6/10)
(F' U2 L2 F2 L2 B' L2 D2 B L2 D2 B2)  // fin                (12/22)

(R) D F U L
F L2 F D' F2 D' // 11 4a1 4e
(L2 [U2 R2 B'])
(R2 U2 R2 F2 L2) //  S in 20

[]->F B' R2 D2 F' // 22

didnt notice this dr->htr i couldve done
(R) D F U L
F R2 B {D' R2 D} // 11 4a1 4e
(R' L F2 R L U2 [F) // htr in 16
(R2]) // S+2e2e

[]->B U2 F' B
{}->D L2 U2 L2 D' // 21