So, most sales use cases are for moving data into or out of a CRM, where the APIs are awkward or don't exist (e.g. LinkedIn -> HubSpot, SalesForce -> Sales Loft).

In your case, you could create a template for your emails and hangout invites, mail merge style. In addition to sending the hangout invite, you could trigger another action in your CRM.

I'm speculating as an example, it really depends on what particular processes you have that are repetitive.