If you are looking for a map to mine lots of crystal go to val crystal cave cords are 34.6 10.5 when you see the water falls fly or grapple in. In pvp it is probably taken as it is a great pvp cave base. Use anky or mantis with high melee to the most. Bring other teams with either a rip weight reduction on Crystal or really high weight there will be lots of crystal and metal.
I have 8 of these. i bred a level 343 male and a level 175 female and my baby can now go toe to toe with 10 rexes or 5 lvl 110 gigas. 100% recommend these. also turn off friendly fire so when thay rage they dont kill you.