Workflow for compression from FCP (ProRes) to Compressor

I'm running Leopard and am about to upgrade to the current Final Cut Studio.

I have some sequences which may contain a mix of clips in dv (sd) format with ProRes sd clips. Many clips are heavy with layers of FX. I am going for absolutely best possible quality for all clips.

I want to compress them for DVD. Is this correct:

a) Disenable all the clips (by Control clicking "Clip Enable" twice, leaving them "unrendered"
b) Make sure the Sequence Settings are set to ProRes 422, and Video Processing to "Render 10-bit material in high-precision YUV."
c) Export to Compressor, with Compressor set at a 1 Pass CBR bitrate of 6.8. I recall that clips may do better this way than with 2 pass for some reason, contrary to general opinion, yes? (why?) Is there any reason to render the seq prior to sending to Compressor?

Thanks .