The only attacks Zhin's Counter Stance CANNOT counter is Jenos' Ultimate. Other than that it can counter literally any attack

Pip's ult can turn anyone into chickens. Even if Nando will not Die, Ash wants to fight, Spring has come for grover or you are daring to challenge Makoa. So save your ult if you notice these characters in the enemy team

If you are crippled go to counter stance. The enemy will either not attack or if they do you can counter the damage. No matter what this will give you JUST ENOUGH time to escape the cripple and use billow to retreat

Any sort of Rush ability like Nando's charge, Zhin's Whirl, Andro's Nether Step, Buck's Leap and so on can counter any small knockback like Ash's or Cassie's. But if it's torvald's ult, You probably need resilience 3