Which janya Of natabhairavi portrays /adapts better

[satyabalu]

* I consider Nagagandhari (sarajijanabha Sodari-MD) explains more as a janya of Natabhairavi.
*Is there anything to compare Papanasam Sivan's "Sri valli deva senapathe"in Natabhairavi-(giving due credit to Radha &Jayalakshmi for popularising)
*what are the other compositions in those ragas viz.., Natabhairavi &Nagagandhari?
*How about discussing compositions of Janya of Natabhairavi?(Is Surya one of them?)