Torvald's Nullify ability relies on Line of Sight. Breaking Line of Sight with Torvald will cancel the Ability early and make him wait for the cooldown.
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
If you have the luxury to do so, place/channel your shield once Recharge is on cooldown. Otherwise Torvald can simply drain it and repair his own shield in one fell swoop.