What would be a good sixth pokemon for a team consisting of Mawile, Mandibuzz, Gastrodon, Gourgeist, and Rotom-Heat? I was thinking of a cleric, a phazer, or maybe something with U-Turn and/or Stealth Rock, but something like a good Landorous would be too difficult for me to obtain (which is why I am using Rotom-Heat instead of Heatran).
And just to clarify, good legendaries are difficult for me to acquire, but most everything else is fair game.
Also, any basic suggestions for the team? I pretty much want to try and make it as complete as I can before posting a RMT. Please and thank you.