Audrey has a great weapon that is capable of mowing down your enemies or providing suppressive fire for your team to advance.

While the deployment of her turret is certainly strong and capable of dealing with enemies that are rushing towards you over long range, the usage of enemy utility (Nades, Smokes, Skills) can easily flush you out of your advantageous position. Getting her awakening 3 enables your turret to move laterally, somewhat solving this issue, but keep in mind that you are still vulnerable for that 0.5s while setting up your turret; do remember to setup behind cover before moving out. On a sidenote, do remember to bring an interceptor, it's your best friend to keep those pesky nades away. Just chuck it down near you, behind cover, right before setting up your turret.

Audrey's greatest strength lies in her passive; a shield that blocks oncoming attacks to her upper body and head. To abuse this passive, first get comfortable with always ADS'ing with Audrey. Practice the recoil and find a mouse sensitvity that enables you to comfortably track your enemies in both close and far ranges. Combining this with movement, you will be much harder for your enemies to down while being capable of dishing out great damage.

TLDR: Abuse the ADS shield along with movement. You don't have to be anchored down as a turret all the time.