If Buck has Ensnare legendary and you're a prime target, Resilence can work better than Haven, due to huge damage buff while the slow effect lasts.

Artful Dodgers legendary or Resilence is a must, even when Grover doesn't use Crippling Roots as his legendary. You have two movement abilities and you're shut down if you can't use them.

Mal'Damba's Ripened Gourd legendary is scary against Maeve. Try not to get too close to victims trying to heal up. It might be a good idea to move to somebody isolated or finish off weaker foes.

Before Ash hits the ground with her ULT, you can use Nullify to cancel it or your ULT to place her damage immune banner somewhere else.