[porkynator]

1.
Scramble: R' U' F L2 B F2 U2 L2 R U2 L' B2 D2 B' U L2 B D' U' F D' F2 R' U' F
Solution: L F' U' B U R U2 R2 U R2 F2 D' B2 F2 U2 F2 B2 R' U' R2 D' U L' U2 D' B2 U2 (27)

Spoiler (Click to View)

Three different solution, all of them 27 moves long!

First:
L F U' B' //EO (4/4)
(D2 R U' L D2) //Blocks (5/9)
F2 D' L (R F2 L) //F2L (6/15)
F' D' F D' F' D' B D' F D B' D2 //LL (12/27)

In case you are interested, this is the optimal finish after the first 9 moves:
D2 L' U' R' F2 R U L2 D R' D' R D2 R' L' (15)
Foks could have found it.

Later I have found that there is a 23 from the same start (credits to Priazz):
L F U' B' //EO (4/4)
(D2 R U' L D' R) //2x2x3 (6/10)
(F2 L D' L' D2) //3e3c (5/15)
(B F2 L' Fw2 L F2 L' Fw2 L B') //Pair 3cycle (10-2/23)

Second:
L F U' B' //EO (4/4)
(D2 R U' L D2) //Blocks (5/9)
F2 D' L D' L' //More blocks (5/14)
F2 R2 U' R' U R2 //3c (6/20)

8-1 insertion

Third:
L F' U' B //EO (4/4)
(U2 B2 D) //Pseudo 222 + pairs (3/7)
U R //One more pair (2/9)
(U2 L U' D R2 U R) //DR (7/16)
(* D' F2 R2 U' R2 U2) //2e2e (6/22)

* = F2 B2 U2 F2 B2 D2 (6-1/27)

In this case the optimal finish after the first 9 moves is findable also by humans:
U L2 B2 L //223 (4/13)
D' R D2 //Square (3/16)
B2 D2 R' D //Square + pairs (4/20)
R2 D' R' D B2 //Finish (5/25)

2
Scramble: R' U' F R' L D F2 B2 R2 L' F B' L' D' L2 D' R2 D F2 B2 D' L2 D R' U' F
Solution: U L' B' U B2 U' B2 D R U L2 D2 B2 R2 B2 D L2 D' F2 D2 R2 (21)

Spoiler (Click to View)

U L' B' //EO (3/3)
U B2 U' B2 D R //DR (6/9)
U' (R2 U2 [s2] B2 D R2 D) //HTR (7/16)
([e] R2 B2 D2 [s2]) //3e (3/19)

[e] = D2 F2 L2 F2 D2 R2 B2 R2 (8-5/22)
[s1] = [s2] = E2 (-1/21)

I had a 22 from this DR after 10 minutes, I am glad I decided to try and improve it for the next 20 minutes

3.
Scramble: R' U' F D U2 L2 D2 B2 U2 L' D2 B2 L R F D U2 R D2 B F2 D F' R' U' F
Solution: F L2 D2 B' U2 B' D B R2 D2 L2 U2 D2 B2 R2 U2 B D2 B' L2 R2 D2 L B2 D' F (26)

Spoiler (Click to View)

(F' D B2 L') //EO (4/4)
F L2 D2 B' U2 B' D //DR (7/11)
B' [3e] (D2 R2 L2 B D2 B') //HTR (7/18)
(R2) //3e2e2e (1/19)

[3e] = B2 R2 U2 [2e2e] R2 B2 R2 U2 R2 (8-3/24)
[2e2e] = U2 D2 L2 U2 D2 R2 (6-4/26)

27, 21, 26 = 24.67