"Smoke screen" blocks line of sight of Illusions, so they can't heal anyone. You can deny enemy heals for 5 sec, just with one skill. Right timing and "smoke" placement is key issues.
Versus "Artful Dodger" Maeve, don't rush to use Crippling Throw. Wait until she will use "Nine lives" to heal herself. Only then Root her.
This way, she has her "escape" on cooldown and can't survive 2 second standing still.
Requares good aim.