I use 100% Floro now and make my own in both 130# and 200#. I have been through them all and even the titanium will eventually break at the loop from repeated casting. I have had super luck with florocarbon. I use the 200# for anything jerk bait related, or 4+oz lures.
I double sleeve both ends, use BB Swivels and Stay Lock snaps similar to these.
Thorne Bros (Part #23471)
If you want to know a cheap way rather than spending $60+ on 25′ of floro, buy a few of these 60″ leaders and cut them apart to make multiple 12-18″ leaders.