I Think The Best Kind Of Team You Want To Use (Me Personally).You Want To Have At Least 2 Bulky Physical Sweepers(Conkledurr or Machamp) And A Special Sweeper(Vanilluxe Or Alakazam) Physically Defensive Pokemon (Forretess Or Shuckle) And 2 Fast Special Sweepers(Espeon Or Deoxys-Speed). Again This Is My Kind Of Plan For Fighting The Elite Four In My Opinion. So You Can Try It Out And See If It Works For You.