Start with the role your team is missing
The current public guides agree on the 11 names below. Use the role as a shortlist, then read the live ability and unlock text before spending Shrooms or beginning a long prerequisite chain.
Warden's Roblox listing confirms that players pick a creature and enter with a team, but it does not publish a complete roster, stat table, or unlock list. The table therefore labels roles as community-listed rather than official.