Dragon's Dogma: Dark Arisen

Daimon is the main boss of Bitterblack Isle. You will need to get through the Gazer and Dark Bishop fights and make your way all the way to the end, the Bitterblack Sanctum. He is actually a somewhat easy battle except for one move: his void vortex. This move is forewarned by him flying up in the air and his hands glowing green. When you see him do this, run as far away as possible and use to call your pawns to you. Once he slams his hands to the ground, he creates a vortex that will send anyone caught in it back to the rift, aka kill them - and this includes you. If you're counting on your pawns to help with this fight and they get stuck, just let him kill you and try again.

The easiest way to damage him is with melee attacks, so if you are using any mage pawns, it may be worth switching them out. I noticed my mage even climbing on him and trying to do melee damage during the fight, so even they know they're not that great with his high magic defense. Basically, climb onto his head and hack him to death.