The combined forces of all the races made the battle with the dark god a bit easier. It is still difficult when the dark god itself attacks but the demigods all joined forces to block its attacks. One attack from the dark god could easily wipe out individuals much weaker than them.
Just the shockwave created from the dark god's attacks could damage those below the demigod rank. It also does not help that the dark god is high up in the sky which only those with extremely long-range attacks or with aerial mobility could deal damage to it.
The odd thing that the players have noticed is that the dark god does not even attempt to dodge the attacks from anyone that try to harm it. A transparent barrier will suddenly appear when an attack is about to reach it and it would mitigate that damage by 50%.
