Use metal billboards, shocking darts, best longneck you have and bring narcs to keep out wakes up fast.

Takes about 60 shocking tranq darts with a 220% rifle, torpor drains SUPER fast, but eats fast too

Pretty standard knock out tame. But you definitely need a trap and distance to avoid the fire breath and stomps as well as keep it from running into lava. Which it could survive

Trapping it with doorframes helps, try to use shocking tranqs with headshots. Sit on a Pyromane whilst shooting to avoid all flamethrower damage.

For taming this id say make sure its in a trap and id say for the gigantic torpor use the lost colony bow if u have it, i used it to tame a 130 boaratos knocked unconscious after a few mins but only problem is the bow deals a lot of health damage too

He can break through all kinds of trap so be careful

If you can lure it into a trap in the water it definitely helps. Then you won’t have to worry about the fire. I went overboard a little. Fought an ocean platform and hover skiff over from Genesis. Built doorways around the top inner part of the platform, then 2 walls down all the way around. Then cover the bottom inner part ceilings. The water is just deep enough to extinguish and not drown the animal. Used the skiff tractor beam and dropped it in the pen. It doesn’t even agro really when you shoot it from above.

USE THE LONGNECK RIFLE AND TRANQ DARTS. Chances are your crossbow will kill it before you knock it out. Made a backup save before trying to tame a level 54. Died with every crossbow I had. Definitely pump it full of narcotic when it’s out.

Knock out tame with high torpor drain. Wait for the flame to extinguish and then knock it out. Meat and kibble

It's a standard knockout, yet you should be aware that higher levels are very strong.

I recommend to either bring a Pyromane or the best idea is to build a trap and lure it into the trap. As soon as Boaratos start firing, just get out of his fire attack radius and snipe it with darts from a distance.

Boaratos can easily kill you with its flame attack, so anything to extinguish yourself or avoid fire damage, is a good idea.

Very basic 3x3 1 height stone enclosure trap is enough to tame. Based on your server settings, bring a lot of narcotics as it seems torpor goes really quickly down, like Giga's does. If you let it attack multiple times before putting it into sleep, you can deplete a lot of his hunger and tame it quicker.

It's also a good idea to kill any nearby Boaratos you don't want to tame, as they are very aggressive and have really huge AoE range for fiery attack. It drops Beacon after killing it and it's being spawned on Therokis (the centered lava island on Astraeos map).