bjack, I often troll with 30# and 50# outfits. I can troll 7 rods and set them up as follows: 3 International 30 wides single speed spooled with Berkley 50# test are close off the transom on flat lines. The center flat line being a little further out then the port and starboard lines. 4 International 50 wides 2 speed spooled with 80# Berkley are trolled 2 out of port and starboard rodholders going back further then the flat lines, and 2 trolled out of the riggers going back the most. Logic being rods that hold more line start out with more line in the water so as to make what's left on all spools equal. I'm not sure that it makes much difference though when you take into consideration line dia. and spool sizes. Seems to make everything equal though. Also, my logic is that the heavier the line, the better chance of landing the fish after hookup, hence, the heavier rods will have more line in the water to begin with. That can all change rather quickly though when a good fish hits a flat line. Lure selection to start with, and this changes as you begin to see what's working that day, starts with cedar plugs and small stuff up close followed by larger lures, daisey chains, spreader bars, etc. out further.
Hope this helps.
Tight lines,
Matt
NIKKI ANN