Explanation
The two actions that are necessary to design this solution using an Integration Procedure are DataRaptor Post and DataRaptor Extract. A DataRaptor Post is an action that can write data to a Salesforce object or invoke a Salesforce API. The consultant can use a DataRaptor Post action to create an event (platform event) using account information. A DataRaptor Extract is an action that can retrieve data from a Salesforce object or invoke a Salesforce API. The consultant can use a DataRaptor Extract action to get the account information from Salesforce

Explanation
The two actions that the consultant should recommend to the project team are replace existing APEX using DataRaptors and HTTPActions, and implement FlexCards and OmniScripts for the front-end. Replacing existing APEX using DataRaptors and HTTPActions would reduce implementation time, as these tools are declarative and do not require coding. Implementing FlexCards and OmniScripts for the front-end would ensure end-user processes are as simple as possible, as these tools provide guided interactions and contextual data. Creating new LWC templates for branding and styling would increase implementation time, as this would require coding and testing. Using existing APEX classes as data sources would not ensure optimal UX, as this would limit the flexibility and scalability of the solution.