Grover's ultimate does not make him CC immune but stunning him will not cancel the aoe heal. Displacement heavy comps are very powerful against him since they can keep him away from his team and reduce his healing.
If you have the Focusing Lens legendary, Skye can be countered if you use a Front Line as your meat shield. That Skye has nowhere to teleport; landing all five shots on her will be more devastating than you think.
Evie can be really really annoying for strix because she can fly over to you and it is nearly impossible to win against her 1v1 as she’s fast and its really hard to land shot.
Just go to front line when she comes to flank you and stay with team.