Best thing about Torvald? No movement ability or CC immunity ability, a perfect target for your stuns. By stunning him you can stop him from recharging his shield or using his ult, so he'll have to buy resiliance first instead of cauterize or wrecker
Terminus's Power Siphon gives him unlimited damage absorption in the direction it's aimed in, but it has limited charge. Try to put him under pressure and make him waste its charge until he's vulnerable, but be careful to not hit the siphon too much.
Ash's Shoulder Bash ends upon hitting a target. Try to block off her most convenient escape path when she reaches low health, trading 800 health for a basically guaranteed kill.