This is a really interesting take on offence. I like the fact you have a Trick Room mode and an out of Trick Room mode. I would like to suggest Mental Herb on the Bronzong over Occa Berry. This will make dealing with Lead Skarmory offence easier and to my knowledge there's not any Fire-Type attacks that can outright kill you turn one on the tier apart from Volcarona which you can pivot in Dragonite to deal with or the uncommon Victini which you can pivot into Garchomp (again Victini is not very common). I would also recommend running Fire Fang over Fire Blast on Choice Band Garchomp, especially if you are going to run a Jolly Nature. Another option could be to run Sandstorm over Fire Blast in that slot to mess up Rain's ability to spam Scald and Thunder repeatedly. One last suggestion that I think is worth considering is running some Special Defence investment on Reuniclus, since you're Steal-Types are Bronzong which is typically going to click Explosion after Trick Room and Stealth Rock has been used and if not it probably wont have enough health to deal with Latios, and Scizor which is not running Pursuit in this case. I think some Special Defence will make you more safe into Latios and give you more opportunities to get you're Trick Room up. Really interesting and cool team and I hope to see more!