Ragnarok: Get a dino that mantis don't become aggroed (i did with a wyvern), ghillie suit (not needed but it helps) and bug repellant, go to monster island (because its filled with bugs and you will not be easily aggroed by other dinos), give it a horn and mount the dino again and follow the mantis with him as nothing will target you. Easy tame!

Use bug repellent to get close to tame

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.

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

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

Best method I was told. Build a 2x2 stone [or wood if low] foundation with 2 high walls, drop in with flyer, feed through wall. Has a massive hitbox to feed it through if lured close to a wall. No repel needed with this method.

Best tame on the game! Had so much fun with mine, knocking out of dino's with club, mining, killing.... Can so so much! Even knocked out my 150 shark with it.

Just don't leave it on passive RIP 260 mantis :(

Just take a death worm horn and shove it up it’s ass

Have a tribe mate land on the mantis with a wyvern. They won't move for the entire taming process.

The mantis Lays eggs more often in the Desert (the desert also has 100% wind)

If you need deathworm horns go to 0,10 (northwest corner of the map) in Scorched Earth and just keep walking back and forth along the northern barrier, a deathworm should spawn in less than 5 minutes.

Valguero Taming Guide: Mantises spawn at the bottom of the Wyvern Scar. To tame them, first you will need to go to Scorched Earth and wall around the North, West, and South deserts at the perimeter of the map. Each circuit around the map should give you 5-10 horns. Horns can be collected from Iceworms in Ragnarok as well.

Once you have your horns, equip a full ghillie suit and bug repellant. Approach the scar from the East, and you should see two cliff platforms in the snow at the entrance to the Scar. There will almost always be several Mantises on the ramp descending into the scar along with dung beetles, titanaboas, and arthros.

Clear the trash, agro a mantis, and run back up the ramp and onto the snow platforms. Mantis should lose agro on the platforms, and you can then start taming peacefully. Approach from behind with your ghillie suit and bug repllant, passive tame with the horns and feed every 3 minutes. Voila, easy Mantis. I tamed 4 in less than 2 hours like this.

If you and your tribe mate work together and have a wyvern. Use it to pin the mantis and you won't have to chase it. Have someone stay on the wyvern and taming is easy. Good luck!

So these are a passive tame, get some bug repellent ( make it ok a mortar or a chem bench and you’ll need; narc, lemons, carrots and pelt)
You will also need Deathworm horns for the actual taming, put them in the last slot on the quick access bar.
Find the Mantis that you want, use the bug repellent (you’ll get about 400 seconds) and no insects will agro by you being near them. Approach the mantis from behind and feed them to it.
It may takes more than one feed? If that’s the case be aware that the mantis will agro for a bit.

Wear Ghillie armour and big repellent to get close to feed horns.
To avoid it running off, have a friend agro towards a pen then begin taming as stated.

Don’t try to get them stuck under your wyvern and get off to solo tame them.. they will despawn mid tame.

Lure it into the water and get tame it from behind. It can't jump in the water

There is a great video on how to kill death worms very early game on YouTube by a guy named fresonis which involves using oil jars and flaming arrows to kill it and catch it on fire while it moves underground. This strategy is great for early game players with limited resources as it only takes around 4-5 oil jars and flame arrows to kill a level one death worm. This is a great way to farm horns for mantis taming.