I know what you mean about moving off the starter diet, I don't think I ever really did the the starter diet and just started eating anything legal. I didn't realize that this was wrong till I started eating almond butter which is completely SCD legal but it "came out" the other end completely intact and undigested, it was then that I realized that just because something was SCD legal doesn't mean I was ready to eat it. I now eat the same thing for breakfast, lunch and dinner pretty much everyday. I am a little afraid to change it up because it is working so well.
I would take a multi-vitamin whether on a strict starter diet on not, Freeda vitamins make an SCD multi and B-complex which are excellent and not very expensive, they are also Kosher which I think is cool and adds credibility to the product. I take the following:
SCD mutli and B-complex
Carlsons Cod liver oil x 2 *****
Fish oil x 15 (5 caps 3 times a day with my colazal that I take 3 times a day) *****
L-Glutamine powder 15 grams a day *****
Magnesium x 3
Primadolphilus(Probiotic) x 1 *****
Note that I took many of these suppliments prior to diagnosis simply for better health. The ones with stars next to them are the ones that I think are most important for UC. Good luck, keep at it, you will get there. It took me a year with diet and colazal to feel better than I felt before being diagnosed. Now one movement a day and my energy level is back to where it used to be.