Oh sure it requires an otg assist and an assist that can hold the opponent in the air after a gamma wave but most assist should work with that.
Mid-Screen
St.H, S, j.MMS, dash OTG assist, Cr.H, S, j.MMHS, gamma wave, Assist, Anti-Air gamma charge HM, St.H, Gamma tsunami.
Corner
St.H, S, j.MMHS, OTG assist, Cr.H, S, j.MMHS, gamma wave, Assist, Anti-Air gamma charge HM, St.H, Gamma tsunami.
The assist I use are Sent(Punch)/Dorm(Dark hole)
With out the hyper finish it does 800k, you can also end it with Gamma crush instead if you wan't, you just need to change the last AA gamma charge LH instead of HM and then gamma wave otg into gamma crush. It's isn't always consistent though so I don't feel like messing with it, and you have to start it with AA gamma charge LH. It does 10k less damage but it leaves your opponent in the corner.