If you have a Mek, use that. When it’s on the ground stinging you and shooting spikes, hammer it with your sword. And when it starts flying, jet onto it’s back and keep hitting it. You could use a mek middle launcher if u have one to
when encountering this creature in the arena, dont try to take it head on, its a stupid move to try an fight it alone, instead, try bringing your tribe members to help you out, it will make it easier, or just bring a bunch of your tames, circle around it so it can be confused, but watch out for its tail, it will shoot spikes out that can kill you, if you get hit by those, your knocked out cold, and when that happens, say goodbye to your precious stuff, bring atleast 14 gigas, 16 rexes, and 15 yutyranous, circle around it so it would not fly away, So the little tips are
1. dont try to fight it alone.
2. bring atleast some tribes or tames.
3. circle around it so it dosent fly away.
4. watch out for its tail, it shoots spikes
5. yutyranous can buff your dinos, very useful.
6. dont get yourself killed.
now that all of it has been said and done, good luck gentleman.
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 ..