Manticore, definitely the easiest boss ever, just breed Rexs for some mutation, I prefer atleast 20HP i 20Melee mutations, 1 Yutyrannus will be enough, just wait for him to land and focus just on him, Golems and Deathworms are there just to stole your time. Easy Manticore strategy, you can do it solo and i recommend you to get atleast 2 gas masks with you so you don't get knocked out.
Bring around 6-7 or more rexs and when it lands everyone get around it and trap it. Deathworms will come and knock u back but just keep moving forward slowly so u dont get pushed out. Even when the rock golems come don't stop hitting it. Goodluck boys :)
When fighting the manticore a good strategy is bring in high level Rex's with good saddles and circle the manticore it then becomes pinned allowing you to kill it without it flying all around .... watch out for the poison it shoots at you though it will kill you off your mount like the poison wyvern ..
Best way by far is bringing as much lightning wyverns as possible. (Most I ever brought was 12 you could probably Cram more into the arena) Make sure you hatch them from lvl 190 eggs and breed them. Bring hundreds of stimulants and put them in the wyvern you will ride. Bring a gas mask or two, an assault rifle with a couple hundred bullets. A rocket launcher with at least 12 rockets. Medical brews and water and food. When you first load in get the wyverns to attack the manticore and pump the stimulants on your wyvern when it’s torpor rises. Be aware it will knock out your wyverns very easily. I brought 9 lvl 250 wyverns into the gamma manticore and the manticore knocked out 7 of them and killed one of them.
When I just spawned in my third time in scorched earth I walked into the arena (not knowing) I saw a guy in metal armor and a shotgun riding a terasaur it was pvp so I hid but I saw a enormous storm cloud lighting and stuff and then that FRIC KING DEAMON SWOOPED DOWN AND BRUTALLY MURDERD THAT GUY AND I was behind and well 😵
10+ high leveled lightning wyverns will work, even for alpha. Make sure to imprint them and bring lots of food. By bringing wyverns, the rock elementals and deathworm won't be able to hit you, and if you're high on melee, the manticore will die in a few minutes.