Wait and watch
"Well, lucky for me, she's not a mere sniper," Samur said as Tristan's legs were cleanly blown off.
As Samur said, Ms. Childbeater here wasn't just a sniper. She was the Sniper Mk-II, currently using the Gauss Sabot Rifle Mk-VII.
This particular rifle was strong enough to easily pierce through a Dragon's hide (unlike the Mk-III version which exploded and destroyed Samur's arm); Tristan's Aura defence was like a piece of paper in front of it.
However, what was more interesting was that Neia seemed to have a heaven defying talent with guns. In fact, this was the first shot which hadn't killed someone; every shot before this had taken someone's life.
It seemed that the healer had a talent in taking others' lives.
Now, as Tristan groaned due to the excruciating pain (he just lost both of his legs, after all), he lost his focus.