Ok here are the two suggestion I will make to this team.
Replace Salamence, Period.
Replace with either
Ability: Victory Star
EV's: 252 Atk, 252 Spe, 4 SpDef
Quick Attack - Get rid of those pokemon with that little bit of HP left
U-Turn - Scouting and coverage
Bolt Strike - Good move and coverage
V-Create - The ULTIMATE move for a sun team
Also deals with threats like Infernape(mentioned by Kronos in comments).
EV's: 252 HP, 252 Def, 4 SpDef
Giga Drain - HP restore, STAB
Leech Seed - Perefect move for such a bulky support
Sludge Bomb - Stab, deals with grass types you have problems with
Protect - Restore some HP with Leech Seed and Leftovers
Wall. Plain and simple. The ability will take use of the sun.
I would change the chesto berry on Ninetales into a Flame Plate or Life Orb, to (a) increase fire type moves or (b) power up moves. And change Rest into Solarbeam.
Ninetales isn't bulky enough to take full advantage of rest(Trust me I speak from experience). Whereas Solarbeam counters ALL of Ninetales weaknesses, and with sunny Day and high speed gets them before they get her.
So past that I wouldn't suggest much else for this team.