Back in the 80's and 90's people would put 15 single hooked lures out on 3 or more thermocline rigs and troll,just keep tighting up the drag until they decided it was time to bring in the rig. Could have many fish on at that time ,don't know how long you have had many fish on that rig. It was told to me that the Cayuga Lake charters went to the State and asked to only allow just 5 baits and no more than 15 points. Many troller tournaments were won with those type of setups.