D F L' @   //222  3/3  
(F R')     //p223  2/5
<U2> R'  //223 inserted U2 to make pair  2/7
U (F2 R B U' B' R' F2#)  //L2E2E   8/15

#=F2 R L' U2 R' L  6-4/17
@=L2 B2 R2 D' R2 B2 L2 U'  8-2/23

********************************************

This skeleton is very close to the only 17 solution but insertion too tricky for me :( 
D F R L2 B2 L' D B2 R' L2 B U B' R' F2 R F' (17)

skeleton :  D F [L' @ U2 R' U F2 R @] B U B' R' F2 R F'    15 to 2E2E
@=M2 
[]=R2 L D2 R'# D B2 R' L2  +2   17 to 3E
#= R D2 R' L B2 L'  +6-6/17

B' L' D' B     //DR-4C4E  4/4
(D B2 U F2 R2 U L)  //DR  11+4b2 4e  7/11 
R2 U' L2 F2 U' D2   //HTR&&OBL  6/17
R' L' # F2 R L   //Leave Slice   5-2/20
#= R2 U2 D2 L2 U2 D2   6-1/25


B' L' D' B R2 U' L2 F2 U' [D2 L' R U2 D2 L2 U2 D2 F2] R U' R2 F2 U' B2 D'
[]=U2 R' L' F2 U2 F2 B2 U2  -2

R' (L D' L)      //DR-4C4E  4/4
U2 B U2 R2 F2 D'    //DR 4b2  0E  6/10
[F D2 L2 U2 R2 B    //HTR  6/16
U2 L2 B2] L2     //Slice  4-1/19

[]=B R2 D2 L2 U2 F' B2 D2 R2 F2  +1/20

R' L2 F', D R
U B2 R2 D2 R  6C3
(U F2 L2 U L2 U')
(F2 R2 F2 D2 B2 D2 R2)   

L' U'   //DR-4C4E   2/2
B2 L' F L F2 L  //5-move-trigger DR  2c3  4E   6/8
R2 D2 F U2 [F L2 F']   //HTR  7/15
R2 U2 R2 D2 F2    //Slice  5/20
[]=B D2 B'  +0


Also got：
L' U'  ，B2 L2 F' L2 F L

(L)F' R' D' L'//DR-3C2E 5/5  
U2 D2 B D B' //DR 10+6c3 6E  5/10
(R2 U' F2 U' R2 U)  //HTR  6/16
(F2 D2)   //2E2E   2/18

F' R' D' L' U2 D2 B D B' D2 F2 U' R2 U # F2 U R2 L'
#= L2 F2 U' R L U2 R' L' U' F2

inserted by IF

(L')F' R' D' L'//DR-3C2E 5/5  
U2 D2 B D B' //DR 10+6c3 6E  5/10
(D' B2 D' R2 D)  //pHTR， M2 Removed  from HTR 5/15
D B2 R2 B2 D' F2 R2  //Fin  7/22

also got:
F(F L' F'   R'   D R2 F2 D' U2 L)  11 + 4a3
F(F' D R F)  D L2 U' R   9+4b3

d

L2 B，D'  //DR-3C2E   3/3
L2 F2 L2 U L' U//  DR  6c3  4E  6/9
(D2 R* D2 R' U2 R*') //HTR   6/15
(F2 R2 D2 F2 R2 D2 F2) // M   7/22
*=w  +0

(U' F L, F')    //DR-8c8e   4/4
(U F2 R2 D F B)  //DR 2c3  6/10
(D' B2 [D' L2 D)    //HTR   5/15
(R2 F2 R2])  //Slice   3/18
[]=U' F2 U' D2 L2 B2 L2  +1

L2 D2 B'   //DR-4C4E   3/3
(R L U2 R F2 U')  //DR  4b2  6E  6/9
U2 B2 R' B2 L  //HTR   5/14
R2 D2 [R2 B2 U2 B2]  //S   6/20
[]=F' B U2 F' B' D2 F2   +3

D' F U' L2 D'，R //DR-4C4E  N2L  6/6
(F' B' L')  //DR   3/9+4b2  2E
({F2 U2 F'} R2 F2 L2 F')   //HTR  7/16
([B2 L2 D2] L2)    //S+E  4/20
[]=U2 D2 F2 R2 U2   +2
{}=F B L2 B'  +1

F' B(L' D F')  //DR-4C4E  5/5
(R2 U' F2 B2 L)  //DR  5/10+2c5
D(F2 U' F2 D' R2 F2 U' L2 U)  //HTR  10/20
(B2 L2 D2)  //Fin   3-1/22