[Request/Suggestion] Tequatl Achievements
He always spawns whirlpools right as he flies away at 75% on every map, no matter how fast he is damaged to that point. Watch the NPC dialog; they will mention avoiding the whirlpools. When that happens look for the new red circles with fingers in front of the turrets (you may or may not see the whirlpool effect) and stand in it.
(I recommend using a Hunter for getting this achievement; with Troll Ungent and self-rez from the pet you can search for the treasure a long time down there)