Which Azure technology for batch routine?

Hello jsefton - I would have approached your requirements in a similar way by seeing if I could achieve it with logic apps. You can, but I agree there is a learning curve.

You might find that DataFactory is a better fit:

https://docs.microsoft.com/en-us/azure/data-factory/control-flow-web-activity

https://docs.microsoft.com/en-us/azure/data-factory/connector-azure-table-storage

Of course, as an appdev; I would drop down to Azure Functions as a final resort. There might be some factors making the extract and load more difficult using Logic Apps.

The benefit of persevering with Logic Apps is once you have it you can extend it easily. You might find that a combination of Azure Functions and Logic Apps might give you the flexibility you need while giving you the development.