Those are some good ingredients Trickster. Parker49, as an organic grower I would say that worm castings are the most important addition to soil.....period!
Good quality compost would be second and yes you can grow on just these two things as your "fertilizer" but there are many other natural things that would make it even better.
In addition to kelp meal which is one of the best amendments I would put alfalfa meal, crab meal and a good all around fertilizer like Espoma Tomato Tone. It's up to you.