Thank you for your quick reply. I wasn't sure someone would be so kind as to answer me, especially since my comment comes a bit late.
I didn't know a-marowak was the only relevant fire type... Are fire types that underwhelming in 7G ?
In my opinion due to its speed and good spdef, ninetales is good against types that do not hit too hard on the special side and against which the ice fox can retaliate with supereffective moves, typicallly water, grass, to a lesser extent special flying and dark. Dragons usually hit on the physical side too, and they have a high speed with DD or scarf so I would choose a choice scarf to outspeed +1 dragons. Vulnerability to SR and priority moves overall seriously hurt it. It also hates prankster thunderwave.
I guess Ninetales can be fine as a nasty plot wallbreaker (with encore or substitute to counter chansey) but it seems to me very close to dead weight against the current bulky offense (amarowak and celesteela kill it before it kills them, as you said there is only a 2HKO at +2) and offense (pheromosa, scarf dragons and tapu koko outspeed it).
As I am still discovering and not a great showdown player, there may be things I do not see...
I didn't know a-marowak was the only relevant fire type... Are fire types that underwhelming in 7G ?
In my opinion due to its speed and good spdef, ninetales is good against types that do not hit too hard on the special side and against which the ice fox can retaliate with supereffective moves, typicallly water, grass, to a lesser extent special flying and dark. Dragons usually hit on the physical side too, and they have a high speed with DD or scarf so I would choose a choice scarf to outspeed +1 dragons. Vulnerability to SR and priority moves overall seriously hurt it. It also hates prankster thunderwave.
I guess Ninetales can be fine as a nasty plot wallbreaker (with encore or substitute to counter chansey) but it seems to me very close to dead weight against the current bulky offense (amarowak and celesteela kill it before it kills them, as you said there is only a 2HKO at +2) and offense (pheromosa, scarf dragons and tapu koko outspeed it).
As I am still discovering and not a great showdown player, there may be things I do not see...