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.
Place one illusion behind Evie if you can, keep shooting her, till either she leaves or you get low, on low health teleport to the illusion, keep shooting her, it will give your allies time to get to you.
most champions will have a hard time dealing with Io and Luna together, so don't engage them together instead try to single out Luna while Io isn't around, so when it comes time to kill Io she can't stun you or body block with Luna.
I honestly think this is a skill match-up. Evie has a lot of mobility and deals high damage, but Viktor deals a bit more and has Hustle to escape if needed. It basically depends on who lands the first shot and surprises the other one.
Wait for Ruckus to trigger his shield then hook him, it will ensure you dont get hit by the slow and that his weapons resets which equals to less damage taken.