Topic. What's considered the ultimate final enemy? Has anyone even gotten there yet? That's why I love this game. You could know every detail about every monster in advance but once you actually face it yourself its a whole new story.
Off topic: was Akantor the name of one of the final enemies in an old game? I wanna say MH2
Actually he isn't the final boss. If I remember topics about it on the Tri G board. You unlock Mirlais at HR 40... After him you unlock the special naracuga (I forget his English name). After that at HR 70 you unlock Abyissal Lagi... So really Abyissal is the last boss you fight. And you can consider him a boss seeing as you fight him in Ceadeus map.