I’m ragnarok coordinates near 21 65. There’s a huge natural bridge that leads through a small cave and opening on the other side. Throughout that entire cave there’s obsidian bring an argy with a high weight and an anky. You will have more than you know what to do with
DONT USE DOED!! Ankylo or Phoenix is the best by far, this is from personal experience. Doed gets you only stone from MOST the obsidian around, on some maps there is another kind which has metal too, that is the ONLY kind a doed can even harvest at all.
PHOENIX IS BADASS!! mine was 37 b4 tame, and now has replaced my quetz cause it has a weight over 1200, and it can harvest all the same stuff as an Ankylo, not as good, but not much worse tbh.
On ragnarok, on the beach just past the burnt area, go into the water and dive down into what looks like a wyvern trench, use a dunkleo, there's tons of it on the bottom of the ravine. I normally get about 30k on normal rates.
Have tried anky mantis and dunkle. Tested on land and water for both mantis and anky and dunkle is by far better on official. Island hunter cave dunkle I get 5k a run on 1x. Barely 2k with the other 2. Put dunkle on top as best gatherer please.