What Is The Best Team For Beating Saurhead For Igno In Fossil Fighters?

I beat saur head with the following:
Spinax; rank 12, all attacks, all bones
S-Raptor; rank 12, all attacks, all bones
Megalo; rank 12, all attacks, all bones

I use t rex frigi guhvorn all rank 12 all body parts and I get to the last battle