My guild attempted this last week and I was seeing great numbers as a cat with agi staff, but since the nerf (and for our kill this week) I have had much more success using spells and an intel pot, its still less damage than last week. Others may have experienced something different but I found the gap significant enough not to bother with kitty anymore.
Doesn't matter if you use agi or int pot if you go cat form - you'll get the int as agi anyway.
The staff doesn't really matter, the one with the most dps is the best one. Remember to make a weapon swap macro/keybind.
Also, if you have Qin'xi's trinket (or any int-proc one) use lifebloom on yourself before the pull to force the proc for more int(agi).
I have not tried to spellcast yet, will probably do next week.