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.
Khan can destroy/disrupt fernando shield. Keep shooting Fernando forcing him to throw out his shield then use commanders grab to disrupt it. Even if fernando has max resilient doesnt mean he can escape stun. Equipt Vortex grip for better result
Makoa It's really effective in short distances, so try to be far away from him and throw it Sticky Bombs in the distance. With the Demolition Talent, you can destroy the shield of Makoa really easily with the Grumpy Bomb.