Any you like really - I'd recommend the adjacent ones that belong to the same skin. You can also combine more than two.
edit:
file(0-139): sprite\ssjgoku\ssjgoku_0&1.bmp w: 79 h: 79 row: 10 col: 14
file(0-139): sprite\ssjgoku\ssjgoku_0&1.bmp w: 79 h: 79 row: 10 col: 14
file(140-209): sprite\ssjgoku\ssjgoku_2.bmp w: 79 h: 79 row: 10 col: 7
file(210-212): sprite\ssjgoku\ssjgoku_3.bmp w: 149 h: 150 row: 3 col: 1
file(140-209): sprite\ssjgoku\ssjgoku_2.bmp w: 79 h: 79 row: 10 col: 7
file(210-212): sprite\ssjgoku\ssjgoku_3.bmp w: 149 h: 150 row: 3 col: 1
file(213-282): sprite\ssjgoku\ssjgoku_4.bmp w: 79 h: 79 row: 10 col: 14
file(213-282): sprite\ssjgoku\ssjgoku_4.bmp w: 79 h: 79 row: 10 col: 14
it's a bit clumsy but that'll be a good and quick compression
edit: also the bitmap does not have to be as big as the row/col you specify
edit:
file(0-139): sprite\ssjgoku\ssjgoku_0&1.bmp w: 79 h: 79 row: 10 col: 14
file(0-139): sprite\ssjgoku\ssjgoku_0&1.bmp w: 79 h: 79 row: 10 col: 14
file(140-209): sprite\ssjgoku\ssjgoku_2.bmp w: 79 h: 79 row: 10 col: 7
file(210-212): sprite\ssjgoku\ssjgoku_3.bmp w: 149 h: 150 row: 3 col: 1
file(140-209): sprite\ssjgoku\ssjgoku_2.bmp w: 79 h: 79 row: 10 col: 7
file(210-212): sprite\ssjgoku\ssjgoku_3.bmp w: 149 h: 150 row: 3 col: 1
file(213-282): sprite\ssjgoku\ssjgoku_4.bmp w: 79 h: 79 row: 10 col: 14
file(213-282): sprite\ssjgoku\ssjgoku_4.bmp w: 79 h: 79 row: 10 col: 14
it's a bit clumsy but that'll be a good and quick compression
edit: also the bitmap does not have to be as big as the row/col you specify

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