I beat this quest on my first try. It was a pretty good instance imho. Almost made me feel like Solid Snake.

Some tips:
- Avoid any inorganic enemies at any cost. They are really annoying if you get detected by them.
- Always use stealth to take out humanoids.
- Use the stun grenade on the beasts.
- Save defensive and offensive cooldown in case you get detected (by hopefully only one enemy).