I use the wychwood stiff link and amnesia for my rigs using crimps. You need to use double crimps as they are designed for mono/flouro. They use crimps sea angling when making rigs and they never failed and they catch massive fish.
i am using the wychwwod crimps as i am finding it hard to get nice neat knots on mono/flouro etc find the joints are strong and neat too. Never had a crimp fail on me yet and i also put a small bit of shrink tubing over the crimp just my preference.