I am intrigued that you troll from a rowboat. I have always wondered if the rhythm of paddle strokes would get more strikes. Do you have a speedometer to gauge your rowing speed? Do you row mainly with the wind? how long do your arms hold out?
As far as your breakoffs are concerned, there is definitely something wrong. I run 15 pound mono on my seth green rigs and RARELY break anything off - and when I do, it is usually when it is thrashing beside the boat with very little slack. And dipsy rods usually have plenty of spring to cushion headshakes. i think you must have some old or frayed line, or maybe you locked the drag on you reel.
Pete
