So you want to change the page name on rollout?

I would suggest the following-1. Create page component with common clientlibs2. Create a template type using page component & template editor.3.create templates for your brands and content author the clientlib specific to that brand through page design (check template editor page design)4. In this w...

Try to reindex the oak index nodes on dev box and check.

If possible can u add your code here so that i can try at my end?

You need to allow a url for 'Banner.jpg.transform" because this is not allowed in dispatcher you have to allow this kind of expression.

Few questions before you implement a scheduler- 1. How frequently you will call rest api.2. How frequently data could change from rest api. 

Try to upload the asset manually with the same name (with timestamp and all)and data and see are you able to upload

Then its visible with the error that data which you are trying to add to a node is invalid. Check any asset which is already in dam and try ti post same data and see how it behaves.

Nothing to do with page or component resource type.Where are you trying to post this data to? 

Make sure your custom code is not overriding any custom node.Have you try to override any node?