being the lord of nithyasūris —

one who is out of reach of celestial entities such as brahmā et al, such emperumān —

being the head of nithyasūris (permanent dwellers of ṣrīvaikuṇtam) —

 for dhĕvathās —

 for nithyasūris —

of nithyaṣūris —

for nithyasūris —

 for the dhĕvathās —