We too faced this issue inside multifield.Please raise a day care ticket.

Try creating a page component using this content.html where you can keep everything except the last two components.Those two components you can directly include on editable template.Hope this helps.

You need create custom index so that it doesnt search over entire repository.Refer below-http://www.aemcq5tutorials.com/tutorials/aem-oak-indexing-comprehensive-guide/

Please check whether these sling models are registered correctly as i mentioned before.https://helpx.adobe.com/content/dam/help/en/experience-manager/using/sling_models/_jcr_content/main-pars/image_6/POM.png

Yes node should be under responsive grid

Please refer below link-Working with Page Versions

Try using proxy in m2 repository.xml and try building the package.

it seems there is no such configuration in touch ui-Refer below thread-cq:emptytext in touch UI

Try like this in ur java class-@Referenceprivate ResourceResolverFactory resolverFactory;ResourceResolver resourceResolver = resolverFactory.getAdministrativeResourceResolver(null);session = resourceResolver.adaptTo(Session.class);// Obtain the query manager for the session ...javax.jcr.query.QueryM...

If you want to load it once then combine all the clientlib and add it in header(css) and footer (js)