He can still use the summons to give him some help before he enters in his SM and it takes him around 5 to 10 minutes to enter SM, but jiraiya is very skilled and has more experience than sasuke obviously, I don't think that sasuke will just kill him before he can enter into his SM because tsunade and his summons can hold him off for a while, I do think he will have a hard time dealing with sasuke but once he enters SM he would win mostly because sasuke will be very tired after all that EMS spamming, tsunade might die though.LOOOL your the dumb one kid?
Answer this how long does it take to enter sage mode ?