Integrating Adobe analytics and Adobe Advertising

Hello Community,

We are looking at setting up an integration with Adobe Advertising and Adobe analytics, as part of the due diligence I had the below questions:

First of all what are some of the challenges of the integration itself.

-Can we map adobe advertising data to a virtual report suite?
-What is the granularity of the data that we can expect flowing into Adobe Analytics?
-Would custom variables need to be enabled to see the data in Adobe Analytics?
-Would there be any additions to current server call usage (this maybe a broad and not worded correctly) but essentially looking to identify any loads or unseen costs?
-Is reporting available in real-time or what kind of latency are we looking at?
- Do campaign tracking code strings need additional meta data to be appended?
- Is data available retroactively?

Overall what are some of the best practices while integrating?

Thanks