These gaps are based on the logic of THIS (click on the link) video.
SSJ2 Goku/Vegeta- 100
SSJ3 Goku (dead)- 300
Fat Buu- 315
Good Buu- 135
Evil Buu- 180
Gotenks pre- 120
SSJ Gotenks pre- 360
Gotenks post- 400
SSJ Gotenks post- 1.200
SSJ3 Gotenks- 2.400
Super Buu- 2.250
Ultimate Gohan- 3.000
Kid Buu- 150
SSJ3 Goku (alive)- 150
SSJ2 Goku/Vegeta- 100
SSJ3 Goku (dead)- 300
Fat Buu- 315
Good Buu- 135
Evil Buu- 180
Gotenks pre- 120
SSJ Gotenks pre- 360
Gotenks post- 400
SSJ Gotenks post- 1.200
SSJ3 Gotenks- 2.400
Super Buu- 2.250
Ultimate Gohan- 3.000
Kid Buu- 150
SSJ3 Goku (alive)- 150