The best way to tame it on any map is use a flyer (or bloodstalker) put it right out of reach were your not to far to were it throws rocks but not to close were it hits you if you have a wingsuit glide away immiditly after dismounting the elemental will be focused on your flyer or bloodstalker. Try to set up a trap around it or just take the risk of knocking it with out a trap
It's a bit silly that kibble tames it a lot better than rocks or sulfur because even in the dossier it says that it lives off of absorbing nearby rocks and minerals. So mabey they should make it so you have to feed them a rare mineral like obsidian what if they made it so you could tame one fast and with high effectiveness by giving one a few hundred or few thousand obsidian . or what if there kibble was made out of a combination of ores and minerals .