I would say the majority of guys that use inline boards use mono in the 10 or 12lb test.Most of the charters and others that use the big boards use braid.You can use hi vis color line for braid or mono.Straight to the lure and will not effect the catch rate.Most guys use braid when fishing with dipsey divers.The most popular brand for dipsey is Power pro 30lb braid in hi vis yellow.I just spooled two reels for a buddy of mine with that same braid last week.I actually use maxima 15lb mono on our rods.I bought a large spool of it several years ago to put on my buddies four new line counters and to respool my rods.The higher test line was decided upon due to my buddy just starting to troll.Was thinking he would get more tangles and nicks on line and would be safer to run the 15lb test.The 15lb test has a slightly thicker diameter line than the dive charts.So our lures will be running slightly higher than the dive charts call for.But all the rods are calibrated.