I played 3 FMC lists at NOVA, beat them all. I only had one skyfire unit. Wasn't easy, though. I believe demons were actually the most common army, but they didn't dominate the top of the field.
Drop pod wolf lists work pretty good, actually. Tau have lots of intercept, but they can't intercept everything, and the pods let you choose where you're going to hit, which let's you get around a lot of the Tau tanking shenanigans.
Generally speaking, Tau only get one tanking unit, the iridium armor commander. Drop some Str 8 ap2 on the other units, and you can kill crisis suits, broadsides. (ignores cover is nice, but not required).
Want to know a fun fact? I only lost a hammerhead like twice, I think.