I'm using a very simple cat macro.

#show
/castsequence reset=target Mangle(Cat Form), Rake(Cat Form), Mangle(Cat Form), Mangle(Cat Form), Rip(Cat Form)

Shred will do more damage then Mangle, if you're willing to ensure your kitty is always behind the mob. Mangle is about 80% of the damage of a Shred now, and does not care about your facing. Even if you do go with Shred, ensure you use an initial Mangle and re-use it once a minute on the mob (assuming it lives that long) to keep the bleed debuff up.

You could preface the macro with a Feral Faerie Fire if you like.
Something like:
/castsequence Faerie Fire(Feral), Null
Not sure that this is the correct syntax for it.

The syntax is correct for the Kitty DPS macro.