Ask yourself
1. Are you desperate to improve your rancour raid rank.
2. Have you rejected moving to a smaller guild where you can get a higher rank with what you have.
3. Do you believe that a new harder mythic tier rancour raid is coming soon and that each guild will need around 100 teams capable to soloing the old heroic rancour in order to be able to take it down.
CLS and Raid Han rends the raid a triviality. Personally I am in a guild where I can usually get top 5 and definitely get top 10 without build a rancour raid specialist team so I am happy to wait for cls and raid Han.
CLS can do a single character solo and can be paired with raid Han and wiggs to do a auto solo.