NEVER engage with Andro, unless you plan on leading him back to your teammates. Annoy him if possible by getting behind but your goal is to lead him to your teamates so you all can bring him down together.
Your shield shields damage from behind and in front of the shield. Given your higher mobility, use it to your advantage to confuse Ruckus. Rocket boots is also useful.
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.