Lex have more damage, but androxus wins on mobility.
Try to strafe/dash in between shots, and use your Q on his RightClick and you should win.
This is a skill match up.
- Try and get used to Bomb King's trajectory, both with and without Accelerant. This will make it much easier to land hits (Or headshots!) on him while he's midair.
- 2 direct hits from Chain Reaction will leave you with 130 health. As such, it is impossible to kill a good Bomb King if any allies are nearby. Isolate the fight if the Bomb King has Chain Reaction.