I don’t run mono (other than to back spools) on any of my trolling rods.
I do however have a set of 14′ rods that I’m playing around with running shorties inside of (4 total leadcore rods out of a 17′ boat without boards). So far I’m still a bit undecided. The biggest pain is dealing with the length of the 14’rods. With some getting used to I’m sure it will get easier. The shorties are angled back at about 45 degrees to give the rod an angle to bend and make it easier to read versus being pointed straight backwards.
My boat only has a 90″ beam. There’s simply no room for another pair of lines (to make 6) on my rig. Even the slightest unplanned sudden turn, a mishooked fish, or an untuned bait and I’d be screwed trying to run 6 leadcore rigs without boards. I’ve found 4 lines at once with me and a knowledgeable partner is more than enough. Between fouled lures, netting fish, deploying lines, running the boat, and switching baits… it’s plenty of work and keeps us more than busy. If we can’t catch them on 4 lines running 4 different lures, we’re switching tactics or locations.