I think it would be a good idea to have a link between the NTA and IPAM products, so VLANs/Subnets that you have defined in IPAM could be imported into NTA IP Groups thus preventing the user from having to create them all by hand. Perhaps a check box in IPAM that allows you to "Create IP Group in Netflow" while you create the subnet/supernet in IPAM.
Saving time = good.
-b