(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)