This video shows the route to the artifact of the pack as well as the jump puzzle. This goes through the crystal cave.
While no special gear is necessary, use the highest gear you have. Tek is best, but if that is not an option anything above hide should work. You will want a melee weapon of some sort, or ranged if you prefer. You will want as much health as you can get if you dont have Tek gear, as the jumping puzzle at the end is over a lava pool. You will also want healing items.
You cannot ride flying dinos in the cave, nor can you use the grappling hook in the jump puzzle area. Cryopods also do not work in the jump puzzle area.
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Thanks for watching!