feral dps is tough with your team. if you're dpsing bosses, this is what i do solo and would probably work best for you.

FFF, mangle, shred shred shred, rip.
bezerk when needed, pop trinks, etc.

this is probably the highest dps you will get.
your highest dps attack is rip. but you need mangle to keep it up. shred is next followed by mangle.
you can also switch to bear and hit demo-roar.
rake when you get bored of shreds.

problem with this is twofold. energy and combo points.
with a castsequence of simply mangle/shred/shred/shred/rip, you're guaranteed 4 combo points and 5 if mangle or shred crits.
FFF and mangle is a mob debuff so you can see it on the mob. refresh when necessary. you dont need any timers for this.
i would also suggest keeping mangle on a separate key just in case you need to refresh it or if the mob is facing the druid, maybe couple it with FFF. remember shreds can only be done from the rear.
also, use cower if you find yourself gaining too much aggro.

dps with a cat takes constant supervision. if its a slave then it might not be the wisest thing to have. though i'd love it for the 5% physical crit.