From what I can gather, the original purpose of the damage reflecting orbs was to curb bots.
According to the wiki:
"Initially on release, frost dragons were only capable of using melee and magic. Due to heavy botting, they were eventually given a ranged attack and a reflect ability."
However seeing as they have been in the game for over a decade, and botting has been slowly pushed back by bot nukes, client updates, and the 2012 botwatch program, I think there are some good arguments towards changing how the frost dragon orb works.
Firstly, for some the orb is irrelevant since higher tier gear and weaponry released over the years have enabled some players to burst down dragons so quickly that the orb doesn't even have time to spawn.
It's impossible to predict when the orb will appear, since it's timing is random, this means that you will hit yourself with the first attack when it shows up. and if you qued up an ultimate ability you could actually end up killing yourself instantly.
Frost dragon bones have went from 16,000 gp to over 25,000 gp. And I don't think many players bot them these days.
Suggestions:
Personally I would remove the orb / ranged attack all together. Since it's purpose was to curb BOTS, but it's actually more of a nuisance and problem for normal players.
Regular players have had to come up with strategies to deal with the orb, but if you aren't a bot then it shouldn't have to be something you worry about...
of course I know that removing the orb completely is a bit of a stretch, so I think that a good compromise would be to reduce the unpredictability of it, at the very least preventing players from dying instantly from something they can't counter attack.
I suggest having the dragon light up, just before the orb appears, giving enough time to stop attacking.
~or~
Greatly reducing the reflected damage of the first attack.
200m Woodcutting: 08/08/2021
Completionist: 09/10/2021