The thing is he does not have the proper equipment. A 6'6 medium rod and a small reel like a silvermax can't handle a 1-3 oz bait. With this equipment he is going to have trouble casting the bait, getting a hookset, and would probablly result in his equipment getting damaged. The issue is not the line its the equipment in general and using the correct tools for the right job.
You aren't going to screw in a nail with a hammer....