Deodiicarus is good for an ass load of stone, but is garbage for collecting any crystal, obsidian, or metal. The anky is the best for collecting the latter 3
If you go into the dododex and look up Gathering it says obsidian and it says it's the top gatherer of obsidian and I know a few months ago I used it to get obsidian and it did quite well on the Legacy servers
Yeah bro doedicurus stone only even from metal nodes crystal and obsidian still stone you need the ankylosaurus hes the workhorse hell get you everything you need lol