My ranking of the metrics for credit card sales process would be
1) CAC 2) NPS 3) C-SAT 4) CES & 5) Churn
In the On-Field sales process for Credit Cards, the major objective would be to on-board new customers for which any company providing credit-cards should hold some number of sales staff to meet new customers and spend of telephone, meeting etc. The second most important metric would be to track the customer loyalty and referral check which helps us to understand how many new customers can we on-board based on the positive feedback spread by existing happy customers. Customer Satisfaction Index comes third as a few of happy customer might share his feedback which translates into referral again. In simple words a major part of NPS is from C-SAT. Customer Effort score comes the fourth as any dispute of help that a customer needs is to be addressed with priority and importance. If this doesn’t happen, would affect NPS & C-SAT. The least weightage I rate is to customer churn in Credit card sales as the process of selling is though dependent on the overall performance but the sales in particular doesn’t depend much on performance of the whole company(C-SAT, NPS & CES comes only after on-boarding the customer) which is why I have given the last preference