I'm too tired to give a full rate, and too busy anyway.
Try this version of the team : http://pastebin.com/MMtfBF9s
I don't like Celebi NP with Recover, but sometimes it dies too fast, HealingWish on Latias helps to not get traped, and can give Celebi the second life he could need. RP/Liechi Terrak is a cool pokemon that can outspeed the whole metagame after a RP, since Jirachi isn't the fastest Scarf ever.
Garchomp should be your lead most of the time, you either SD or SR depending on the damages you could deal.
Try it and tell me if you prefer this version.