Hello, cool team you have here! First of all, I'd like to applaud the creativity you've put into this thread by deciding to base it around a seriously undermined offensive threat (and also, one my favorite Pokemon of the new generation), Frozen World Kyuremu. Anyhow; at this point your team looks pretty solid as after Smith's rate, you were more or less able to patch up you biggest weakness: opposing offensive sandstorm teams. Because of this, I'll stick more or less to minor move set changes which may better your teams structure. Firstly, I'm going second Smith's suggestion of mixing up the order of your team, as to lure your opponent into leading with a Pokemon which is handled easily by Kyuremu.
Also, I suggest you switch the roles of Latios and Starmie, by making Latios a Choice Scarf variant and Starmie a more defensive, Rapid Spin variant. Due to the fact that you often use Kyuremu mid-game, I think that Rapid Spin support would be invaluable as it Stealth Rock (and Spikes, for that matter) will greatly limit Kyuremu's ability to constantly switch in and present a threat to the opponent. This change won't mess up your team's structure (and synergy) as Choice Scarf Latios works in a surprisingly similar way as Choice Scarf Starmie, being able to revenge-kill many of the threats you would rely on Starmie to do. I hope this has helped, and good luck!
Suggestions in Short
- Mix-up the order of your team
- Choice Scarf Latios over Life Orb Latios
- Rapid Spin Starmie over Choice Scarf Starmie