Direct interaction between Gods and men
Your own thorough practice of Metta is your best protection. 
Being reborn in a God realm is not the goal in Dharma Practice. 
Leaving Samsara is the initial goal, and Buddhahood is the Ultimate Goal.
Gods and Devas also are within the rounds of Samsara.
As beings who take rebirth in the God realm also eventually have to leave that realm when their karma for that lofty position is finished.
Actually this human rebirth is the best for the full attainment of Enlightenment.  

Here is funny talk on just this topic.

https://www.youtube.com/watch?v=ibx_2nmHyV0&amp;feature=youtu.be&amp;t=960