Elemental shamans are one of the best specs at the moment for dungeons. Incredible ascendance cooldown that is up for pretty much every boss, chain lightning that is incredibly powerful vs trash, and stormlash totem as a raid wide dps increase. On top of that the off healing with ancestral guidance is really good.

In raids ele shaman is currently one of (actually the) weakest spec when you take all available parses into account, but dungeons are almost tailor made for ele, even with bad gear).

Not sure what level you currently are, but at max level you really shouldn't have issues with your eles unless you are doing something wrong.