Hi,
We are in the process of setting up a landscape with a new single-stack SAP PO 7.4 on HANA.
The idea was to have a central AEX in Europe, with multiple AAE's. Different AAE's for Europe, Americas and APAC.
We were planning to do all developments as much as possible with the NWDS, as it seemed the most futureproof, so we are also creating iFlows for everything.
However when I look on help.sap.com on many of the pages I've found, it never lists iFlows as possible to be deployed on the AAE. They always speak of Integrated Configurations...
Does this mean if we want to use the decentral AAE's that we are limited to Integrated Configuration?
The way I understood is is we do the developments on the PO in Europe, and then deploy to the AAE's that require it. For example a flow for Brasil would go to the AAE in Americas...
Please advise! 
Kr,
Frederik-Jan.