Duotone images are created in photoshop, and saved as either EPS or DCS. Create the duotone in photoshop and specify your pantone colors.
He wants a 5 color job…and you’ve got more colors than 5 listed there. So, you have to cut back on your PMS (spot) colors. I’d be tempted to do 5 color process with a 5th color as a single spot color. But, not knowing anything about the design, what your client wants, etc., makes it difficult to respond.
https://www.youtube.com/graphicsdump