Finally managed to get all 19 Weapons of the Scion after 4.5 years of (almost) daily Dragonstom!
So in case anyone is curious how long it might take, let's say I've missed 10 days per full year, that's ~1597, so roughly 1.18% drop rate.
This seems in line with ANET's expectation of giving out only 4 weapons per festival, usually resulting in 4 years to get a set of 16 weapons. They often give a 5th chest ** in the first year** a festival set is introduced, assuming you do full achievements and weeklies.
Next project is Tequatl's Hoard!
Oh, I agree. It is OCD combined with ADHD. I literally cannot play another game (MMOs excluded, since they are endless) before completing a game to what I consider 100%, not dictated by achievement lists. So it may include completely optional things, like seeing rare random events or bugs.