I use a 30ft sink tip 200 to 300 grain lines. 200grain on a six weight , 250 on a seven weight , and 300 on an eight weight. 3 ft flourocarbon leaders and weight or unweighted woolies,deceivers,etc. I usually do this when fishing spillways. Because all of these spillways are on the Missississippi river I can use 2 flies. Down here there are quite a few spillways, Wabasha, Winona, Pickwick, LaCresent, etc. Two of these produce walley, pike, drum, and catfish all year round. A person can catch close to a dozen different species in one outing. As an example my best day this year was white, yellow(rare,no state record yet!!!!), smallmouth, largemouth, and rock bass, catfish, drum, bluegill, mooneye, sucker, and pike.
It's fun not knowing what and how big the next fish on the line is.
Teeny lines are my favorite.