I've seen some videos of it post buff and it seems to perform much better than it did. I think "string of curses" looks like a very strong perk in the Crucible. I have yet to compete the bounty but I'm pretty psyched about it.
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I have it maxed out and I enjoy the gun, I find more useful in pve then pvp. But if you got good aim and can keep precision headshots in pvp. You should have np keeping that mag full and never reloading.