Captain Ashym and Mossman
When I soloed Ashym on melee-range he always immediately swapped at 25%. So I would assume there’s something on his AI checking whether target is on melee-range (like when looking for new target or something, just rare enough to allow results we see now).
I think Mossman only turns animal if you reroll Swamp. I have never seen it happen except when I soloed Mossman and had to reroll Swamp because I got Bloomhunger on first try.
Mossman seems to be on a timer but the captain seems to random as kitten
Yes, The captain has 3 phases, his mace/shield, then he switches to staff, and when he switches to staff it’s best to stay at max range cause if you get within a certain range he will pull his Firey Great Sword, it’s a range trigger.
http://dulfy.net/2013/01/07/gw2-fractal-of-the-mists-fotm-guide/#8
Välkyri – 80 Warrior
JQ[Lulz] – Kill fur Thrillz…
As you can see in my video, he shouts, but doesn’t switch, because there is no player in melee range (aprox 600 range) if you break this line he will switch.
I believe Staff is on a combination of timed and HP % trigger, as I have been in a group where he didn’t even get to use his first agony burst