How do you play late game Vindicta?

I’ve been playing her lately and find she’s great early to mid game, however late game I’m struggling to get kills and stay alive. I find she can’t do enough damage without the rest of the enemy team pretty much 1 shotting me (lookin at lash here). I try to stay back get sniped on half health people but it seems even a snipe won’t put them down. Any tips or feedback?