FlexSlider, Media Galleries, & Nodes (entity reference)
I can recommend the ”Entity Reference Views Formatter" module.

https://www.drupal.org/project/entityreference_views_formatter

You then have full flexibility of views to output your Entity reference fields!

Here is a good thread on how to use the Entity reference views formatter module, setting up the correct Relationship and Argument can be a bit tricky.
https://www.drupal.org/node/1889358