If you can land a Pyre Strike on Talus when he's approaching half health, you can keep him from manually returning to his Rune of Travel and give you and your team time to finish him off.
Don't use the Solar Blessing talent when fighting Willo! She can simply place her Dead Zone on top of where your Pyre Strike stops and completely negate the healing.
When Bomb King activates King Bomb, run into his path and use Battle Shout. Even without Firing Line, the short damage immunity will negate his burst, though you'll be stunned afterward. Make him detonate early like this so he won't reach the point.
Try to bait Terminus off the point by getting somewhat close, keeping your void grip ready. Use it as soon as Terminus uses his shatterfall attack. It'll cancel the attack, putting it on cooldown while you retreat and your teammates melt him.
To counter Khan shield without buying wrecker, go to the highest platform and shoot above him. He will resort retreat. There is very rare chance if you manage to shoot his feet just like Vivian. Only snipers can do it but very rare.