I use Firecrest because I got a four set on the first day of UG, all 268 despite only running Hard, single phase at the beginning. Since then my drops have been next to useless with 214's and Deadeye and some others which I won't ever use or that are considerably worse than what I have.
Which also makes me believe that the loot tables are completely screwed up. To get four 268 drops in one day, and then, from what I remember anyway I haven't had a single other 268 drop from a set I want, is ludicrous. I don't care what Massive say, there's something going on with the drops so they're either weighted towards the few hours after a patch drops or the game is coded to only drop a finite number of certain gear across the whole game. I certainly don't believe it's random at all.