Tip overview

Mal'damba is the best healer for duels, if the Androxus is foolish enough to get close to you where you can comfortably hit your shots and the reload stun you CAN win, but if he doesnt good luck waiting for respawn.

Map Brightmarsh. You can dash over the Roof where the capturepoint is. Good to surprise and flank someone from behind/above. Also works with Evie,Drogoz,Maeve maybe even Willo (didnt tryed with willo yet)

Strafe around unpredictability. Makes you much harder to aim at. Create angles with team mates so he can't hide behind cover to stop all damage. Don't try to 1v1.

If you accidentally feeding his reversal,try to create distances as far as possible and try to dodge it by moving and jumping when he shot the reversed damage, since the damage are reversed in projectiles type which make it harder to hit movingtarget

It's highly probable that Androxus will Refersal and then Nether Step away from combat when in danger. After that, he's mostly a sitting duck, because you probably still have your movement abilities and he doesn't.