It's been a long time since I didn't use 3Delight, but I think a good solution would be to write your own shader. It's not that hard, and in fact a lot of the code you would need is already existing in other shaders, making the writing of your own quite easy.

Some of the functionality (especially occlusion) you need might be better with the use of a magic light (magic lights are a very useful tool when you begin to write shaders) : the ambient occlusion processing (which is related to all geometry in the scene) should take place in the magic light, and the value of ambient occlusion for the pixel being shaded passes to the different surface shaders during the illumination loop.