So I'm now stuck on Ninja Exam 287 which has a lightning puppet alongside third raikage and a bunch of other ninjas that work well together.

What is the best way to get rid of elemental puppets? There aren't many ninjas that do elemental damage that aren't also easily obliterated by the enemy.

I've tried using ignition and poison but the puppet is mostly immune and my ninjas die off before it can stack.