SusanoO's perfect form, just no stabilized.
He used it against Hashiblablah
And hashirama power level still means nothing if he cannot catch or defend himself against minato's attacks... Power means nothing if you cannot hit anyone with it now does it...
What can Minato do to him ?
Rasengans ? That shit is weak as hell.
Death God ? Way to become a stationary target.
In fact the 1st can ruin Minato's kunai marking by simply summoning a rain forest on the spot. Good luck making use of FTG with a shit load of branches and roots in the way.