I've been trolling with a humdinger double spinner with a line tied to the back eye (by the blades) running back to a swivel then back to a rooster tail and doing pretty good on them. But I'm having a problem with losing the back rooster tail. Either the knot pulls off or breaks. What kind of rig works best for this? Or what have yall been using? Thanks.

50 lb big game with a palomar knot on both ends.

That 50# big game is what I use for hybrids on my double rigs. A guy named Matt taught me.