I beat ZH solo, with 5 minutes left. I'm not a great PvP player, nor am I the best at PvE (1 Raid clear in my entire career.) ZH enemies are tough, but aren't invincible. (Ad deletion takes priority. ) Use something with an incandescent, or firefly perk. Auto-loading holster is great too. (Make your enemies explode, and you'll be fine.) I've made it to the final mech fight 3 times, but the time restraint and silly platforming have been my only problems from day 1 ( ZH's first release).