As a kid i was was taught to use the blood knot.
One of my fishing mates taught me the centauri knot. Use it for hooks and line joins.
With a set of scales we found the line busted below stated line strength with the blood knot - above the stated line strength with the centauri.
Seems to work OK with braid or braid nylon joins.
easy to do in the dark make the loops big and you can do it by feel.
all of the above tried up to 40 lb line strength, dunno if it still applies above that.