Application Implementation Consultant role customization

Summary: Hi Experts,

We are doing a cloud transformation project where we are building integration for Oracle fusion cloud using OIC.

To connect to fusion cloud we are using ERP adaptor with a Integration User created in SAAS. Now our problem is that Oracle states that we need I Integration Specialist roles along with Application Implementation Consultant(AIC). Our client is worried on giving Integration user AIC role as this is quite an extensive job role. We have created a custom role with bare minimum privileges as mentioned in Oracle doc like SOA Administrator , FND_MANAGE_CATALOG_SERVICE_PRIV , AttachmentsUser, but the connection errors out while testing.