oro, knowing what he's up against will go full out right from the start with the eight branches technique and manda. minato will throw his kunais out while placing seals on the ground if needed. once hes close enough he rasengan's manda in the eye. orochimaru uses formation of ten thousand snakes. and an army of snakes covers the battleground. so minato summons gamabunta and uses food cart destroyer to beat the snake swarm.
still inside eight branches, orochimaru uses wind release:great breakthrough and repels the kunais back. then he spits out kusanagi and tries impaling gamabunta. minato blocks it with his speed and goes on the offensive. gama wrestles with the eight snake heads, and minato tries getting close. he successfuly cuts orochimaru in half...who just heals right back up with gathering of the snakes. minato tries again and orochimaru uses attack prevention to fuse with his eight branches while still attacking with many hidden shadow snake hands. minato is caught but teleports out of there back to where gamabunta is. orochimaru extends kusanagi again and takes gamabunta down. he calls up hashirama and tobirama as his last card in the deck. minato decides he has no choice against ET and makes one last series of seals, in order to use death god. this time orochimaru sees it coming and uses kage bunshin to defeat it.