If the tip of his arrow shimmers, he is preparing an Impaler Arrow. Avoid being pinned to the wall at all costs; his Planted will do 2400 damage before you can even move again, and likely another 2400 to follow, killing anyone.
If enemy team has a Tyra, you are most likely better off using "Crackshot" legendary since Tyra can counter your stealth and mitigate the effectiveness of your other legendaries
Buy haven, even that 7% reduction on all shots may mean that strix must take 3 shots at you instead of 2. This is massive since you have way more time to attack him. Buy nimble since it increases your movement speed making it easier to strafe.