Explanation
The OmniStudio tool that is optimized for performance and minimizes configuration time is DataRaptor Turbo Extract. A DataRaptor Turbo Extract is a tool that can retrieve data from one or more Salesforce objects using a graphical interface, without writing any SOQL queries. A DataRaptor Turbo Extract can also use filters, joins, and formulas to manipulate the data. A DataRaptor Turbo Extract is faster and more efficient than a DataRaptor Extract, and can handle large amounts of data without hitting governor limits

The consultant should design the FlexCards using a Parent FlexCard with multiple Child and Card Actions to meet these requirements. A Parent FlexCard is a FlexCard that can display data and actions in a card format, and also contain one or more Child FlexCards. The consultant can use a Parent FlexCard to display the account information, including account name, phone, and website. A Child FlexCard is a FlexCard that can display data and actions in a card format within a Parent FlexCard. The consultant can use multiple Child FlexCards to display the active opportunities and contracts related to the account. A Card Action is a button or a link that can invoke an OmniScript or an Integration Procedure from a FlexCard. The consultant can use multiple Card Actions to enable the user to view and renew contracts