Feeds with multiple Entity References per node?
To my knowledge the solution you are looking for is not available directly through published modules.

You can find the beginning of the answering you are looking for at 

http://clikfocus.com/blog/drupal-developer-tip-multiple-entity-references-using-feeds-importer 


Create a custom target callback for your field importer. The targets array is keyed by the name of the target so it is necessary to differentiate your custom handler from the standard field handler for that entity reference field.

function my_module_feeds_processor_targets_alter() {

  foreach (field_info_instances($entity_type, $bundle_name) as $name =&gt; $instance) {
    $info = field_info_field($name);

    if ($info['type'] == 'entityreference') {
      $targets[$name .':custom_handler'] = array (link is external)(
        'name'        =&gt; check_plain($instance['label'] .t(' (Import multiple values into multi-instance field')),
        'callback'    =&gt; 'my_module_set_target_entity_reference',
        'description' =&gt; t(''),
      );
    }
  }
}