Do not be me and knock out a 150 after searching 3 hours coming to realize it's a passive tame.

Use bug repellent and cactus broth when taming, this makes agro range literally 0.

Kill every vulture in area if can. They will aggro on mantis and make tameing bar restart.

Best place to get Deathworm horns is the Ice Queen cave on Ragnarock. Just take a Sabertooth and eat the easy male death worms. Easy horns they spawn back fast. Use them to tame the mantis.

HELPFUL TIP! Make sure you have more horns than needed as Dododex was wrong on the amount, ruined my 150 tame