Yeah Cobra shielded him on his final legs against probably the strongest being the verse, so what brother? What is that proving?
Until we see that real level Imu is about this is just speculation and you trying to downplay Sabo for no reason.
Again the Reverie didn't prove anything you are just using your headcanon as facts which they aren't.
Shit this arrow/tail or whatever the fuck that is hard to figure out. I thought the end part was connected to silhouette body when cobra got stabbed first time so it would be same for this as well. Which is why i thought that the attack was probably from the back and sabo was sliced thru his right lower abdomen.