Genos is stronger than Orochi in his suicide 10 second mode that he displayed in the recent fight, being able to deflect/momentarily match psykorochi's beams (10000x above what regular Orochi dishes out).
No One piece character is tanking his full power blast as weird as that sounds, and he's fast as fuck too. Mihawk wins if he goes all out off the bat, but attempting to toy with Genos would fuck him over.