The boss fight is fairly simple.
1. Enki is shielded and chases you around
2. Enki stops and shoots a swirling disk at you, just keep moving to avoid it. If it hits you it will freeze you for a while
3. Enki summons 3 creatures to help, kill them
4. Enki leaps into the air to ground pound you, again keep moving to avoid it
5. When Enki lands they become stunned, now is your chance to do damage
Repeat until Enki is dead.