I was writing a HUGE response to this, but I accidentally hit the back button on my mouse:( Because of this, I'm just going to condense that message. I have a lot of tough points that need to be made, and I refuse to sugarcoat it. Read it and rant at me about how I'm wrong, I don't really care, I'm just helping you out. If you feel the need to try to defend yourself against someone helping you, then you should be worried about other stuff rather than whether or not this team will succeed.
1.Concept: Weather is a gimmick style of play in generation 4. No point in arguing against it, that's the way it is. Running two weathers is like shooting yourself in the foot. There are several times when you will be wasting turns trying to get the right weather up, and you could easily accidentally help the opponent or hurt yourself. You can't truly abuse both weathers well together, and I think that the cons FAR outweigh the pros. Also, I have a feeling that you thought up this concept, then tried to find stuff that fit it without thinking too much of strategy. I don't think this concept can truly take off, and I especially don't think that this team is using this concept to its full potential (whatever that is).
2. Little effort put in: Despite the fact that you know this team is outdated, you posted this RMT with stuff about Salamence and Latias. I'm fine with you asking about how you can replace Latias, but you are writing like they are both still usable (thankfully they are gone). Also, you obviously haven't looked into or even thought about even month old shifts, let alone present day activity in the metagame. You are hit hard by Fire/Water/Grass core and stuff that try to beat it. Even older stuff like Mixmence, DD mence, Breloom, Scarftar, and Latias tear this team apart. Really, it feels like you were just bored, saw the forum, and decided to post this team.
3. The other stuff: Look at the top 15 OU of July. Of the top 15, you have problems with ALL of them. Gengar or Starmie will stop a LOT of these problems. As it is obvious you haven't tested this concept or this team out anywhere near halfway enough, or at all recently, I'm not going to bother saying much more until you've fixed the thing up, or at least explained it a bit more. If you want me to try it out or try battling it, I'd be happy to oblige, just tell me when you want to meet on Wifi or Shoddy.