Re: Getting a perfect round on round 8 in the crucible
Two words.
Red Dragon.
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And now to explain, for starters, it's a clockwork pistol, and it has the fastest reload time of any clockwork pistol around, it's powerful, and by god, while using the aim feature, it rips enemies to shreds, I just completed The Crucible myself with nothing but The Red Dragon and I finished it in a total of 593 seconds flat.
The troll was easy with that little beauty, it just involved me running around it, capping off as many shots as I could at the Nerve Tendrils, whilst still having the time to kill the Hobbes, if the Hobbes start swarming you, use the Aiming skill and just abuse the rapid fire feature, because it reloads so fast, you can pretty much unload as many clips as you want without fear of losing time to reload.
Aside from that, I don't know what else to suggest, and to get The Red Dragon, I strongly suggest picking up a Clockwork pistol, again, because of the reload and fire rate, it just makes doing the Shooting Contest an absolute breeze.