[Answered]  Beating Rip Fire Valtryek

I recently battled my friend, but I wasn't able to beat his Rip Fire Valtryek. Does anyone know a good combo(preferably attack) to beat it?

PS: I used Roktavor Heavy Accel
Go crazy throw him around with X.H.H or go for a more controlled X.H.X

Or you could go defensive with U2.H.N
In my experience they seem to burst easily with anything I throw against it