Getting pushed back by ash to the edge of the map? Androxus' Nether step can counter this because ash can't push you very far away. So can Buck's Heroic leap, Evie's Soar or Drogoz's Jetpack
Run through "Siege Shield" to deny Ash’s zoning. When shield is behind you, its no longer useful for Ash & her team. Be careful and don't do that trick on low health - Ash might burst you down.
Ash's ult is powerfull and easy to counter(all cc abilities) but you also can make her not even use it, like hook with makoa , torvalds ult , Jennos grip, Shalin's and Cassie's rmb arrow can block her 'Ult jump' or move her ult to other place
Ash's shield is small compared to the other tank character's shields (Height-Wise). If you can, try to get above her shield or go around it to attack her.