I have always been wondering if somebody could undergo a heavy scourging and anyhow give a good show during the crucifixion thereafter. My understanding is that whipping was quite wide spread in the Roman times, and for centuries later, and hardly it has been considered as a death penality. It was rather a punishment, of various degrees. Even for Jesus, this was supposed to satisfy the Pharises, and after that He should be set free. And everybody was surprised that He could not survive more than 3 hours on the cross, even after this ordeal. So that it seems that even if hard whipping was something horrible and gruesome, the condamned should survive and have enough strength for the rest.
Scourging on the back, even administered with a whip loaded with bones shreds, pieces of metal or even hooks, would tear the skin, the tissues underneath, cause unbearable pain and blood loss, but it is hardly possible that could cause fatal injuries, unless carried out to the extreme. Blows given to the buttocks or the limbs are painful, but both are well padded with tissues. Weights on the whip tails could even break a rib or two, but it is difficult to directly cause death, unless they are given at the front of the condamned, where direct hit could compromise a vital organ in the chest or abdomen. And in fact it is quite rate to see a condamned undergoing a frontal whipping.
So I guess that in order to make the ordeal of a condamned to death by crucifixion as gruesome and painful as possible it is very likely that scourging, even heavy scouring, was widely administered, probably with other tortures suitable for the occasion.
Sweet sweet kisses Gabriella