Can be done solo, but with a friend things will go super easy. Starve tame with ovis in snow biome, hard to find but in x2 taming event one or two are enough. Have a small pen, capture ovises with argi and kill them when ready to feed. But first, once you capture your mana in a five behemoth framedoor cage, let it jump ALOT first, don't tranq it right away. Wait at least 5 minutes, try to aggro it into freezing you then proceed on tranq (Bring extra!). Once under, you'll find your mana already hungry and ready to take all the mutton you can give, Thus you turn hours of wait into few minutes.
Pretty straightforward tame. Eats meat, so mutton's a great choice. Definitely want a trap with a ceiling. Only fits through behemoth gateways, or so is my experience. Mammal, so it has a gestation breeding timer and produces living offspring. Incredibly fast base speed, suggested to level Stamina for ultimate rocket power. Suggested stone trap.
I watched a video on this, thought I share. Watch nooblets for moré info. U can trap it with 2 small Dino gates. U place one, lead it into the doorway (so his head is stuck) then u can freeze it with an owl, get lose and place a second doorway a little bit past his head near his shoulders. Boom he can no longer move. (Hope this helps, if not watch his video😊 )
First things your gonna wanna do is make a ton of narcotics for tranq darts out the longneck and than your gonna want to make a harpoon launcher with the net projectiles equipped
Second your gonna want to go to genesis 2 and kill a few Ovis for mutton than u want to find this cricket on crack by where u find the shadowmanes
Step three your gonna want to pray you have good aim and net it up and put it to sleep I personally starve them for a bit but you do you and than bam you have a tame low levels are faster and the higher ones are longer