>>31903410As an Aurora Veil user myself, I often face threats that don't let me set up my veil, including rock, fire, steel and poison types, which will often aim specifically for my Ninetales. Besides that, it's very frail, and definitely not the fastest pokemon, as well as it specifically requiring hail to be able to set up.
This means that pretty much any pokemon that can outspeed ninetales and has type effectiveness (or just any strong physical attack) such as arcanine, or anything that overrides the weather such as a drought torkoal can pretty easily deny me my Aurora Veil.
To be honest, I believe it's often more difficult to set up than it's worth, which is why I only really bother if I'm against something that will let me set it up without too many difficulties.
>>31903441Do keep in mind that it can last up to 8 turns due to Light Clay. By that time the battle's often already over, unless you manage to stall well enough.