I know this one's a bit vague, but it really comes down to your playstyle; skilled Androxus players rely on split-second timing. Try and use this to your advantage; usage of specific parts of your kit at the right times can help you a ton.
Assuming Buck hits you at point blank with all his pellets in the head, he will need 3 shots to kill you.(2.8s) This will never happen. You can knock buck down to 500 HP with the Daggers+Pounce+Daggers combo (about 2s). Easy kill from there.
when you see trix shooting towards you and getting invicible try to shoot him(and make him vicible again after 500dmg)spray/shoot/splash dmg near the place he just turned his stealth on
You do not want to duel Maeve as her combo WILL one shot you. Stay away from where she likes to play unless you have an ally who can kill Maeve first with you.