Ok, so I was testing out random some random strategies and teams on Pokemon showdown when I realized: is Luxray holding a toxic orb with facade good?
If Luxray plans to stay on the field for a long time, give it the flame orb, because it does a fixed amount of damage to you in a single turn. If Luxray plans to stay in for a short time, give it the toxic orb, because it will take away barely any of your health for the first few turns, which Luxray can stay in for.
Hope I helped!