Instead of memorising these algs as separate cases I memorised them as a sequence of transformations from some "base" algs.
Here's an example, take this 3e alg:
R2 F2 L2 U B2 L2 F2 D
We can get another alg for the same case by doing:
R2 F2 L2 Uw B2 L2 F2 Dw
We can generate a 2e2e alg from...

Fixed
21:
R' U' F R2 U B2 U' L2 U' F2 L2 D2 F' L2 R B' U2 L' D2 U' R' D U F' R' U' F
D' // Reduce U/D to 2 bad edges (1/1)
F' D2 R' B // DR-2E3C (4/5)
(R' L' D' R D) // DR (5/10)
R2 B2 L' // Thistlewhistle (3/13)
F2 L2 R2 // 1x2x3 (3/16)
D2 F2 U2 // 2E2E (3/19)
Skeleton: D' F' D2 R' B R2 B2...

23.33 AsR mean solutions
R' U' F D2 B2 R2 B' F' U2 L2 D2 L2 F2 U' B' L D' R' D2 U R' B U' R' U' F
23,
R' U' F D2 B2 F2 L D2 R' B2 D2 R D2 L F L' D2 L' R' U' L2 F2 R' U' R' U' F
23
R' U' F R2 U B2 U' L2 U' F2 L2 D2 F' L2 R B' U2 L' D2 U' R' D U F' R' U' F
24

22.9 ao12, I won't beat this in a long long time
R' U' F U' B2 L2 D' U2 L2 U' R2 F2 L R D' R' F2 R F' L2 U B2 R' U' F
24
R' U' F R' U2 R' F2 U' R' D B' F2 D' L2 D2 F2 U R2 D' L2 D L2 B2 F R' U' F
21
R' U' F L' F' L D2 B2 D2 F2 L D2 B2 L2 F2 L' D L2 U' R2 F R' D2 R' U' F
21
R' U'...

Really cool Domino solve, reminiscent of Sebastiano's WR :)
R' U' F U R' F2 L2 U2 R2 D2 F' L2 B' D2 L2 R2 B' D' F R2 B L F D2 R' U' F
R' B L2 D'//EO+CO (4/4)
(U2 B F' R' F2 B2 L')//DR (7/11)
B U2 B' U2 B2 L2 B' U2 B' F'//J-J to 5e (10/21)
R D2 R' L B2 L'//to 2e2e (6-4/23)
R' B L2 D' B * U2...

More solves with DR, 23.67 mean (AKA, I did 1 good solve and 2 ok ones)
1) R' U' F U' L' F D' B' L2 F' L' F' D R2 D B2 R2 U B2 L2 U2 B2 R' U' F
20
2) R' U' F D2 L2 U2 L' F2 U2 R' D2 F2 R' D2 R D F2 R2 B' F L D' R' U2 R' U' F
26
3) R' U' F D' U' R2 U L2 B2 D B2 U' R2 F' D R D B' L' R2 U2...

Just got my PB ao12 of 24.50 and all using Domino. The first 9 solves are from another DR-only session and the last 3 are from the ongoing weekly facebook comp
DR is OP.
1)R' U' F U' B2 D' F2 R2 B2 U' L2 D' F2 L' U L2 R' F' L D2 U' R2 U2 F R' U' F
24
2)R' U' F L2 U2 B2 R2 B U2 B' F2 R2 U2...

I do DR in 3 main steps
1)EO
2)reduce to 4e4c, 2e3c, or 2e4c
3) setup to R, R U R'/R U' R', R U2 R', respectively
I switch between steps 1 and 2, and steps 2 and 3 mainly to try to get a better case if the DR setup looks bad

I did a DR-only ao12, it was 25.7
1)R' U' F L' B' F2 D2 B2 L2 U F2 L2 U' L2 D L' D L' R' U R2 D' R' U' F
25
2)R' U' F B' U' R2 B2 U' F2 R2 F2 D L2 F2 U2 F' D2 L' F' U' B' R2 U F2 R' U' F
24
3)R' U' F R' B' D F2 L2 U' D2 L D' F2 U2 B' R2 U2 R2 D2 R2 B L2 F R' U' F
26
4)R' U' F B U' L2...

I tried the 4 move EO on normal, as well as the 3 move EO on the inverse, but I couldn't find any good continuations off that
I then noticed if I do a B on inverse it will leave a 3 move EO on normal so I gave that a try too.
If that did not work out I would most likely have tried EO on a...

Solutions+thoughts for my 24.33 NR (AsR #2) mean at Medan Farewell 2019:
R' U' F L2 B2 R F2 R' D2 L2 R U2 F U R' F' L2 D2 F' R2 U L2 F2 R' U' F, 25 moves
R' U' F D B2 U2 L2 F2 U B2 D L R' B D2 R2 F' U R' F' R' U R' U' F, 25 moves
R' U' F R2 B U2 R2 F U2 B U2 F' D B' R D R' F L2 F2 D U2...

27.00 mean at Singapore Championships
1)28 moves
R' U' F R B2 D2 F2 L2 B2 R F2 U B R U R2 D' L U L2 R' F2 R' U' F
2)26 moves
R' U' F L2 D' R2 B2 D' R2 U F2 U2 R2 U R B R2 U' L D2 B2 R2 U2 F' R' U' F
3)27 moves
R' U' F U' R2 U' R2 U' L2 R2 F2 D2 U' R2 F' U L2 R U' F' U2 B L' D2 R' U' F

If you use Rniss at that point, the cube is an F2L-1. That insert is the optimal alg to solve the F2L pair which I learnt a while back. I saw it this way, although the setup to sexy way of viewing it is valid too, but perhaps less obvious to find