[porkynator]

1.
Scramble: R' U' F D2 F2 D2 L B2 L' U2 B2 L' R' U' R F2 L F2 D' B U2 B2 D R' U' F
Solution: DNF

Spoiler (Click to View)

Really bad time management. I was tired and I wasted the first ~15 minute looking at just one EO, and it was not even particularly good. Then I only had one decent DR, and I found a skeleton:
L (U' F2 R)
(U)
F' B L2 B
U F2 U
L2 B' L2 F2 L2 D2 //2e2e in 18
But the insertions were terrible, and I ran out of time.

2.
Spoiler: R' U' F D L2 F2 L2 B2 U' F2 L' B R2 F2 D F L R D B2 L U2 R' U' F
Solution: L B' U2 B L2 B' R' D2 R D2 R2 U2 B' U2 R2 B' D2 R2 D2 B2 U2 R2 F2 U' F' (25)

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(F U) //EO (2/2)
L //Simplify 4-1 (1/3)
B' U2 B L2 B' //Setup (5/8)
R' D2 R //DR (3/11)
(F2 R2 L2 [1] U2 B' D2 F' [2]) //5e (7/18)

[1] = L2 U2 B2 D2 R2 D2 B2 U2 (8-5/21)
[2] = F D2 R2 U2 B U2 R2 D2 (8-4/25)

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

Spoiler (Click to View)

B F' U //EO (3/3)
(F2 B' R) //Simplify 3-1 (3/6)
F D2 B' //Setup (3/9)
R' B R' //DR (3/12)
L2 B' L2 B2 F' R2 B' U2 B //Finish (9/21)

DNF, 25, 21 = DNF