If you have elixir like ''hunter elixir'' you can choose 3 option when clicking the rift portal that appears. First class, coach class and stowaway. Each option takes you to a different map where the drop rate is hightened depending on which class you took.
First class gives you the best map with least small bosses and highest chance of good loot. Meanwhile coach is less likely to give you the same drop rate on xp orbs and so on.