I guess you forgot about oral rebirth.Sakura isn't needed. Team 1 rapes this.
Onoki's clones can act as decoys, while Tobirama has enough time to throw out his kunai marked with FTG. Once that happens, Ay's speed is useless. Lets not also forget, that Onoki can make Tobirama fly and Tobirama can teleport Onoki via markings. They will easily defend each other from all ranges. If Onoki lights up Tobirama, his speed will increase as Ay was, and even Ay will be overwhelmed. Hiruzen and Sasuke get one shotted by this [You must be registered for see links].
The biggest threat is Ay. Sasuke and Hiruzen have non-factor in this fight.