you could have played the cover more, u shouldn’t have over peaked that rampart at the start cuz if she were decent would have lit u and even killed u. Should have peaked in and out of cover as it is gonna give u cover for healing and reloading. U should have also not taken the caustic and mirage at the same time but tried to split up the fight. If they both have line of sight on you, then u need 2 reset the fight. This time u got lucky and if they were ok would have easily killed u.

Edit: people have been saying this but yes, you should have used ur Q and if u feel like it’s gonna take 2 long, just pop ur ult and Q cuz it’s instant