I use a good 20 pound mono. p-line or a low viz green high quality line. Flourocarbon line has memory problem. I use 6ft leaders also, snubbers are a must with dipseys. I always use the same knots and they never break ( Polomar ). Set your trip bar alittle lighter on the trip tension. Don't need to set the hook, they already hooked themselves.Just enough pull on the rod to pull the trip bar out and keep the line tight and steady retrieve. I rarely have any issues with dpseys. I change the leaders occasionally after a lot of use to prevent twist and fray. Mainline is 30lb Power Pro.