I mainly consider line tests by what I'm trying to do, with respect to depth and speed control. We fish open water up here most times, so I use 2# test Fireline Crystal with a 2# test fluoro leader. Fishing this line on 3 of my rigs now for over 2 seasons and am very satisfied. Two are the 7' B n' M SHSS and the third is their 9' in the same model line-up. Casts well. Strong. And no issues with knots. (I use the Alberto for the joint to a 3' leader section.) The fine diameter of this fused line allows me great control with whatever weight jig I'm using and/or the depth I am fishing.
"A voyage in search of knowledge need never abandon the spirit of adventure."