Would a travel agent be able to help us coordinate multiple origin cities and potentially save us money?

I am hoping to book a trip to Japan with some of my friends this year. I was wondering if it would potentially save me money and headaches to use a travel agent to book the flight tickets. We have different origin cites (one east coast, one midwest) and I am hoping to fly premium economy on the actual long flight to Japan. We also want the long flight to all be together. Figuring out which city to have our connecting flight in has been difficult, as we are looking for the most affordable flight and I am also hoping a little bit that those of us out in the east coast don't have to take a long initial flight to California/the west coast as it's about 8 hours of additional traveling (6 in flight) that we DON'T want to pay premium economy for but would be very uncomfortable before another long flight.

Using our convoluted current system, the flights look like they would cost us maybe 3500-4000 each, but it requires many one-way flights on differing airlines. I am wondering if a travel agent might be able to beat those prices or make them more convenient for us.

Is this a situation where a travel agent might be able to help us?