He's also usable with Obitio Boy and 3-star Nine Tails Naruto.
But since he hits everything he's most effective in ninja war where you can set up ignition combos with other Deidara teams. Have everyone burn the enemy and then watch 3 Deidaras nuke the world like they're Tendo Pain.
Also Itachi and Playboy Sasuke have ignition that lasts 3 rounds.