Well, let's see:
Blissey and Flygon looks good... I don't know if Feint Attack on Flygon is the best idea, but i don't know what you could put in place of it... So keep it i guess...
Keep Sunny Day in Ninetales... Although that can be a bit "redundant", "Drought" will only stay on the field if Ninetales speed is lower than Politoed/Tyranitar/Hippowdon... In case any of these pokemon switch in, you can put the Sun right back up... Although you'll risk losing Ninetales...
Leech Seed can be useful, but if you're planning to have the sun everytime/as long as possible, keep growth... it's too useful under the Sun to get rid of it...
Arcanine really needs Extreme Speed, to cover it's "not so good" speed...
And i have to ask: As much of a wall that Foretress is, i don't think it's that good under the Sun, for obvious reasons... Although to be honest, i don't think there's a better physical wall available, so i don't know...
Yeah, that's it for now...