Are you planing on bottling it still or conditioning it in the Bottle. If you are going to bottle condition than you cant add more sugar, apple juice, it will just ferment out again.
Primary: 3 gallon cider S-04
Secondary: Valentine Apfelwein Clone 1 Gal
Bottled: Halloween Apfelwein Clone 1 Gal
On Deck: 90 Shilling Clone