Override selection for a customer group
Advanced Config adds Price Select Rule to the Magento customer-group form.
Use a group override when every customer in that group should follow a different strategy from the storefront default. Available choices include the global configuration, Lowest, Highest, a custom sort order and an individual formula.
A customer-level rule can take precedence over the group. When testing a group change, use a customer without a separate customer override and clean the Price System cache.
For a custom sort order, arrange the price types in the group form. Position 1 is the highest priority.