Method #1:
Lossless Darts Xp/Hr: Infinite (done while training other skills efficiently)
Description: Fletching is done as a 0 time skill by making darts while doing other skilling methods, doing this during skills where you wouldn’t be playing alts anyways is more beneficial than spamming darts during something like agility due to the high opportunity cost.
Video Examples:
2t wc:
3t fishing:
3t fish with zulrah scale alt:
3t mining:
red chins:
oak doors:
firemaking at ge:
Chinning:
Hallowed Sepulchre:
wintertodt:
between rounds with short respawn times
No video but very viable: Agility Herbiboar