Re: Ponderance....
Firewing's an honorable foe. He's not going to start the game with the NND or even his biggest attack against an unknown female. He's going to attack 7 times in the first turn and probably get deflected 6 of them. On the 7th he'll see that his 14d6 attack isn't enough to hurt her.
For the second turn he'll upgrade to the 12d6 AP. That'll get 10 through her FF and FW but she'll recover it at the end of 12. That'll cost him 28 End but he recovers 25 of it.
On turn 3 he will go with the NND. An average roll will stun Gravitar on phase 12, meaning she'll lose her phase 2 deflect. Firewing will hit her with the 16d6 eb on phase 2 to save end. That'll stun her again.
Turn 3, Phase 12 takes 35 from NND, recovers 20. She's at 45 stun and stunned.
Turn 4, Phase 2 takes 56 from 16d6, ED is 24, she takes 32. She's at 12 stun and stunned.
Turn 4, Phase 4 takes 56 from 16d6, ED is 24, she takes 32. She's at -20 stun and stunned.
If Gravitar follows the "deflect" strategy she loses in 3.5 turns assuming Firewing hits and she manages to deflect each round.