General answer: Is there a high tension level in the relationship? If yes, complete Module one alone.
Is there a pattern of one significantly pursuing and the other distancing? If yes, complete Module two before considering a joint effort.
Is there abuse in the relationship? If yes, work on Modules one and two alone. If you are unsure about he level of abuse, complete the checklist in Module two.
Feel free to complete the Modules jointly if there is a limited level of tension, you have both verbally committed to the Modules, the two of you, for the most part, can interrupt your negative cycles and there is a mutual agreement to have a better relationship.
Please know that Modules one and two set a solid basis for success in a new emotional connection.