How to create a custom workflow with multiple attachments

I have a requirement to create a application that integrates with EBS. This application requires adding multiple documents and sending them for approval. Im using a custom workflow that's compatible with AME for the approval and storing the uploaded documents in a custom table.

I came across some blogs on attaching multiple documents when they are stored in FND_LOBS.

1. How can I get multiple attachments in a approval notification(if documents are saved in a custom table)?
2. Is it a good practice to save the documents related to my custom application in fnd_lobs?

Thanks in advance