I'm confused what is the best burst bey
I have Valtryek,Kerbeus, Roktovor,Spryzen,and Horusood

Put this in the Q&A section

By themselves none of them are perfect, but you have good customization options like: Roktavor Heavy Accel or Kerbeus Heavy Defense

Moved to Beyblade Hobby Q&A.

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I would probably say Longinus or Luinor.

I would say with the parts you have,
Rocktavor knuckle accel
Spinggan/kerbeus center defense

Kerbeus is a good bey