Finally getting some good guns in this. Got a nice bolt action sniper that heals you for 30% of crit hits, so headshots heal me for like 5k+ lol. Also got a good AR running with bone shards II and that parabelum thing or whatever skill, the one that gives you a free reload if you have less than 30% ammo on a kill. Makes decay bullet uptime MUCH easier. That one fight where you have to clear the court yard at the giant gate, there would have been no fucking way I could have beaten that without sustained decay bullet uptime. Even then, I was running around like a fucking druid trying to kite guards in Freeport while dodging Alphas instagib jump attacking you.
The zerg mobs in this game are simultaneously the easiest and hardest enemies in this game. If you can get a choke point going, they're easy mode. But the second a choke point isn't viable and they are coming from multiple angles, you can get fucked up super fast. Especially the little zergling ones...at high difficulty they can kill you extremely fast. They're the main reason I'm running the bone shard skill, I need that AOE to burst down packs of them so I don't get overwhelmed.
The Amazon enemies rank up there too. They're like zerglings, except they dodge like ninjas and knock you back and fuck you up super fast.
And fuck the blood seeker elite. Holy shit that enemy is fucking bullshit. It's literally like blood seeker from DOTA, you can't really outrun it. Your best bet is to try to CC it and land crit headshots /w decay before it becomes immune and owns you with its 1-shot attacks.