YruRU, Roux or ZZ. Tbh Mehta isn't actually bad. I'm working on OH Mehta OS. If I finish it, 1/3rd of the solve should be RU gen.
PS: YruRU is actually 100% worth the effort you put into learning it.
PS2: If you're too lazy to learn CPLine, then just use LEOR

Petrus-Tripod/Snake Pattern: 42 STM
z2 // inspection
U2 B' U L' R D //dbl
R D' B L B' F2 D // dFl
U2 R' F R2 F' //EO
R' U R2 U' R2 //dbR
U' R U R' U z' //dL
U' R' U' F' U F U' R S' R' U R S U2 //ZBLL
Next: U' B2 R D F L B2 D' B' U2 L2 B2 L2 F2 U F2 U' B2 D' F2 L2

Got 10 bad edges. Ouch: 65 STM
U' F R U' D L2 F D' R F' U' F //EO
U D' L D' R2 //cross
R U' R' U2 L' U' L //pair
R U R' L U' L' U L U L' //pair
U' D' R U2 R' D //pair
U' R U R' U' R U2 R' //pair
U' R U2 R2 U' R2 U' R2 U2 R' U' S' U2 S U' R2 U2//LL
Next: D' B' R F2 D' R' L' B D U2 F U2 B2 R2 D2...

Nothing fancy here. Just some ol' boomer F2L: 31 STM
U R' U2 R U F U F' //pair
R U2 R' U' f' L' f //pair
U2 F' U F U R' U2 R //pair
U2 R U R' U F' U' F //pair
Next: R' F2 D2 L D2 L2 B2 D2 B2 R' D L2 F' R F' R B' U B2

Mehta-CT: 51 STM
R2 r U r' B2 u B' R //FB
D' u2 R2 u R2 U' R' //3QB
u F R' S R U R' U' f' //EOLE
R' U R' U2 R U R //2x1
U' D' R' D' R U' R' D R //TSLE
R2 U R2 U R2 U S' U2 S U' R2 //TTLL
Next: U L2 D L2 R2 D' R2 U' F2 U R U R' U L' B' F2 D L' U

41 STM:
z2 // orientation
U' L D B U' F' // 2x2x2
U B2 U' B2 L U L' // 2x2x3
U' R S' U' S F' U F //EOF2L-1
U2 R U2 R' U' R U R' //LS
F R U R' U' R' F' R U2 R U2 R' //ZBLL
Next: D R2 B L2 R2 F2 D' B2 D' L2 D2 L U B R D' U2 B

YruRU, Roux or ZZ. Tbh Mehta isn't actually bad. I'm working on OH Mehta OS. If I finish it, 1/3rd of the solve should be RU gen.
PS: YruRU is actually 100% worth the effort you put into learning it.
PS2: If you're too lazy to learn CPLine, then just use LEOR

Petrus-Tripod/Snake Pattern: 42 STM
z2 // inspection
U2 B' U L' R D //dbl
R D' B L B' F2 D // dFl
U2 R' F R2 F' //EO
R' U R2 U' R2 //dbR
U' R U R' U z' //dL
U' R' U' F' U F U' R S' R' U R S U2 //ZBLL
Next: U' B2 R D F L B2 D' B' U2 L2 B2 L2 F2 U F2 U' B2 D' F2 L2

Got 10 bad edges. Ouch: 65 STM
U' F R U' D L2 F D' R F' U' F //EO
U D' L D' R2 //cross
R U' R' U2 L' U' L //pair
R U R' L U' L' U L U L' //pair
U' D' R U2 R' D //pair
U' R U R' U' R U2 R' //pair
U' R U2 R2 U' R2 U' R2 U2 R' U' S' U2 S U' R2 U2//LL
Next: D' B' R F2 D' R' L' B D U2 F U2 B2 R2 D2...

Nothing fancy here. Just some ol' boomer F2L: 31 STM
U R' U2 R U F U F' //pair
R U2 R' U' f' L' f //pair
U2 F' U F U R' U2 R //pair
U2 R U R' U F' U' F //pair
Next: R' F2 D2 L D2 L2 B2 D2 B2 R' D L2 F' R F' R B' U B2

Mehta-CT: 51 STM
R2 r U r' B2 u B' R //FB
D' u2 R2 u R2 U' R' //3QB
u F R' S R U R' U' f' //EOLE
R' U R' U2 R U R //2x1
U' D' R' D' R U' R' D R //TSLE
R2 U R2 U R2 U S' U2 S U' R2 //TTLL
Next: U L2 D L2 R2 D' R2 U' F2 U R U R' U L' B' F2 D L' U

41 STM:
z2 // orientation
U' L D B U' F' // 2x2x2
U B2 U' B2 L U L' // 2x2x3
U' R S' U' S F' U F //EOF2L-1
U2 R U2 R' U' R U R' //LS
F R U R' U' R' F' R U2 R U2 R' //ZBLL
Next: D R2 B L2 R2 F2 D' B2 D' L2 D2 L U B R D' U2 B