Migrating Fixed Asset Master Data

HI

I would like to know if there is any best practices or guidelines for transferring fixed asset master data or master data in general ?

We are moving data from ECC 6.0 to ESKER (PR Approval App) and require all fixed asset master data to be transferred/migrated in CSV format.

Issues we are facing are:

Issue 1: Standard way to distribute data to external systems using IDOC or ESR?
Issue 2: How to distribute master data using IDOC or ESR
Issue 3: Once distributed how can we distribute deltas.

If anyone can provide any assitance will be greatly appreciated.