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Perhaps you can get a pokemon with Stealth Rock or Spikes utility; it helps a lot because the residual damage adds, and can help your team a lot since it seems to have an semi-offensive play-style! For example, Skarmory can set up spikes, Garchomp can provide stealth rock support, Foretress can set up both, and other pokemon like those.
But, what I do recommend that you visit the Battling & Team Battling board if you want some more detailed assistance, in which you can ask your question in the Simple Questions thread and someone with intensive knowledge about team building can help out as soon as possible!
I'm suggesting this because unfortuantely, this board is mainly for welcomes and introductions, and this doesn't really qualify. I'm sorry, but I'm afraid I'm going to have to close for now, but please, feel free to make a new thread where you can introduce yourself! :D