camron

The point of kaio ken not being used on ssj is a poor argument and goku an trained gohan how to maintain the form for extended periods of time regardless of emotional state. During the cell games they both had full control of the ssj form and arguably could have used kaio ken while in ssj1 and more than likely goku has been able to use kaio ken while in ssj2 somce the buu arc as he has been heavily training on control and then pushed himself to discover ssj3

Lastly, goku shows the use of god ki, ssj and kaio ken in super all conflicting forms that require different types of control and mental fortitude and there is no way he would have gambled on putting kaio ken on ssj blue if he hadnt already spemt amply time using kaio ken on his normal ssj forms previously with general success.