If the enemy Ash doesn't pick up Resilience or the "Battering Ram" Legendary, then you can punish her for it by saving your hyper beam to knock as out of her ult's safety circle. This will often waste her ult or her movement ability.
You are not CC Immune when you ult. A smart Torvald can use his Hyper Beam to waste your ult. To counter this, consider Picking up Resilience if you can trust your team to help you deal with Torvald and his team.
Avoid Ulting Zhin as his counter will waste it and heal him depending on the cards in his Loadout.
If you must Ult him, do it right after you see him finish using counter so he cant block it. He can still billow but he wont kill you or heal from it.