What is the best way to prioritize information, with your team colleagues?

I intend to do a group activity here in my company to list the avaliable information in an e-commerce product page. Example: buy button, product image, product description, other users comments etc.

We want to order it by priority, from the most important to the last.

What are the best tools/ methods to make it, involving the entire team?

I heard about Affinity Diagram and Card Sorting, but I want to hear more from experts =)