If RMB, you Reversal. Reversal will reduce Lex to low HP. You should always pick the Dark Stalker card. A good way to counter him Is to just out-damage him. You survive more shots than he.
When Evie leaves Ice Block, there's a brief moment where she vulnerable before she can Blink away. Time your Pounce and Daggers to finish Evie off if her HP is low, or for some parting damage if she has the Reprive legendary card.
Grover's axes do so much damage at long range, that Grover can potentially have more damage-per-second than Kinessa at a certain point, making him a strong option for dealing with her at a distance.
If Pip ults on you try to hide on corners or behind objects. If he's not very close to you zigzaggin can help avoid his shots. Otherwise you have to count on your team. If death is inevitable, get as close as possible to make him receive self-damage.