I saw Crescent Moon dropped once for other people, I remember it was blue and not purple.
Make sure you are in the correct class and spec for it to drop, wowhead are often inaccurate, refer he ingame dungeon guide
I ran multiple CATA TW with a fresh lvl10 in heirloom as a DPS and it was devastating experience, met frost DK tank, semi-afk tank, everything is just frustrating.
11 fury are a necessity at this point.
You can just farm a full set of TW60 gear, assuming this is about a fury twink, if you don’t have access to lifestealing you should be dropping haste for versatility, you can get +6 attackpower enchant and lifewarden to keep you up