Deidara works best with Obito Boy or Jiraiya since they set the whole team on fire. A popular team for ninja war was Move 1 Jiraiya, Hinata tanking next to him, and Deidara in the back waiting for people to be on fire. It's just vulnerable to interrupts so your meta has to move past Iruka and Neji and Guy before using it.

However when three teams of fire mains ran the same comp, all three Deidaras became Tendo Pain. It was nasty.