Check at the start of the match if Grover has the legendary card which gives him the ability to root with crippling axe, if he does then but the item to reduce CC duration, this can save your life many times during a match.
Your sustain means nothing when Willo uses deadzone on you, your best bet would be to approach her when you have darkness to out damage her in the short run, in the long run of a fight Willo will almost always win
When Strix goes into stealth, he's fairly loud, allowing you to be able to more accurately predict where they will be. Strix usually hides and peeks to shoot, but shoot once, teleport mid-long range, and he's toast after the second shot.
Viktor's ultimate is reliant on him having direct vision of you so moving out of sight behind a corner or using opaque deployables(such as Inara's wall) will prevent him from selecting your location.