Hi there!
I got your request so here I am to rate your team.
It's quite the common Sun team which we can see on the ladder, but it has a big weakness to Stealth Rock since you lack a Rapid Spin user or a Magic Bounce user to prevent any kind of entry hazards in general. Your only answer against Stealth Rock users is your Terrakion, which can Taunt them but it's a suicide lead so it'll die quite quickly during your battles and when it's gone your opponent can setup the Stealth Rock without any problem. Therefore, I suggest you to use Xatu instead of your Alakazam which while it's a good Pokemon in general, it can be replaced here. Xatu is a good mon to prevent entry hazards since it can switch into the common entry hazards setter such as Ferrothorn, Skarmory, Forretress and so on easily. It has problems with Tyranitar and Terrakion, which are Stealth Rock user too, but I have a solution for this as well. However, you should use the Xatu set from
this page on the site (I hardly support Heat Wave because a) you use a Sun team and because b) with it Xatu can easily bypass some annoying walls like Skarmory and Ferrothorn and destroy Scizor too).
Then, I was speaking about a solution to stop Tyranitar and Terrakion which can smash your Xatu and setup the Stealth Rock anyway on your team and I think that the best option is Dugtrio which can be used instead of Gothitelle. Dugtrio is a good trap-killer too, which allow to eliminate annoying stuff like Specially Defensive Tyranitar (which your Gothitelle loses to), Terrakion and even weaked Politoed. Speaking about the weather setter it only loses to Hippowdon but you have Xatu which walls it all the day so it isn't a problem I guess. You may try the set from this
page and see how it goes.
Now I'd fix your weakness to Latios and Lati Twins in general (yes, even Latias is a problem, especially the Calm Mind one which can 6-0'd you with the right support) without changing too much on your team because I already changed two mons of yours. In my opinion, you should go with a bulkier EVs spread on your Heatran, like a Special Defensive one but with Magma Storm. A bulky EV spread of 248 HP / 252 SpD / 8 Spe with a Calm nature and with a moveset of Magma Storm, Toxic, Sunny Day and Protect or Roar (Roar is better if you fear Substitute CM Latias) is probably what you need in this team. This Heatran allows to trap-kill mons like Politoed (only the bulky one), Jellicent and even Latias, of course it's a good check for Latios as well thanks its SDef investiment. Try it and see how it works.
As last thing, I have just a preference of mine. How do you feel with your current Ninetales? Frankly I think you should run a bulkier EV spread on it because it's your weather setter and it should live as much as possible. An EV spread of 252 HP / 120 Def / 136 Spe with a Timid nature is probably better than yours, so try it and see what happen.
Good luck!