If you can, I found that the best way to actually get proficient with Showgirls is to actually run them in a campaign. You learn to use all their scheme shenanigans rather proficiently without Colette until later in the campaign; it's great practice for all of their abilities. If you focus on practicing with their scheme management/control abilities, this tends to be the key to running the crew successfully. Colette just helps them do what they normally do better.