Regarding sharing audiences between AAM and Krux, you can share AAM Segments with Krux for that you need to raise a ClientCare ticket with Audience Manager Support Team as this can be done through Server to Server (S2S) Destination setup. Audience Manager Support Team will setup Batch Data Server for segment sharing to Krux. For that you need to provide a few details to them like:
Batch Data Format you want :
For Web or for Mobile. If Mobile then it is for iOS or Android
Once Format is decided and S2S Destination is setup, before you map segments to your Krux Destination (in the AAM UI) you need to fill out the Krux taxonomy file and deliver it to Krux representative. This will allow for the segments to be created in the Krux platform.
For Krux taxonomy template file please contact Audience Manager Clientcare.