For gamma use 5 fire wyvern level 200+ 5 poison and 5 lightning for beta use same but with level 250-300 and for alpha use 5 deinonychus with 10k+ stam 5k+ hp and a lot of dmg and use wyvern for the other slots first have wyvern on passive wait for manticore to land latch on it with the deinonychus and then un passive the wyverns and kill the manticore

More Manticore Encountering Tips