If you're hiding behind something and have a visual on Lian, you can surprise her with your first shot, teleport to a different location where you'll surely see her and finish her off.
Drogoz's tail and horns are included in his hitbox so if he's far away, aim a just little higher than normal. This will prove helpful since you can shoot him once while he's not looking, and if he decides to ascend, you'll be able to catch him.
Willo's hitbox is very large and she's slow so you have the advantage if you're able to aim for her wings. If she decides to fly away from her original location, don't track her, predict where the arch will slow down at its peak and shoot there.
Can Take her out fast with a quick left click followed by a pounce... Very satisfying... Code name 1-2 combo, Follow up with a question of "do you want fries with that".
Grover can do a lot of damage to your teammates trying to get on point. Consider flanking to Grover's Spawn's side and shooting him. This will make him have to focus on you and not killing your team. May throw off flankers for a bit. STILL DANGEROUS!