[
  {
    "tier": 1,
    "name": "难度1",
    "enemyParties": [
      {
        "partyId": 4001,
        "weight": 70
      },
      {
        "partyId": 4002,
        "weight": 30
      }
    ]
  },
  {
    "tier": 2,
    "name": "难度2",
    "enemyParties": [
      {
        "partyId": 4002,
        "weight": 50
      },
      {
        "partyId": 4003,
        "weight": 50
      }
    ]
  },
  {
    "tier": 3,
    "name": "难度3",
    "enemyParties": [
      {
        "partyId": 4003,
        "weight": 50
      },
      {
        "partyId": 4004,
        "weight": 50
      }
    ]
  }
]