[Kaos]

Wow, I love this team. Good stall is so hard to come by these days. I'm definitely gonna use this for a bit if you don't mind.

Alright, so the first thing that jumped out at me was no Toxic Spikes on Roserade. Even before I saw your mention of it, I was outraged. Toxic Spikes are so great for stall, and I know from using dual-spiking 'Rade that she isn't too overburdened. Your team in particular looks in dire need of it for threats like Chandelure and Mew (mostly the stall-breaker set). I know exactly where it should go: over Sludge Bomb. Uninvested Sludge Bomb isn't great because it isn't SE against much, and Giga Drain is so much more useful for taking out a weakened Blastoise or Donphan, two spinners Sableye doesn't particularly enjoy blocking.

The other thing was the lack of a spinner. Even though you have Xatu, sometimes people can sneak hazards in, and she has bad matchups vs a lot of common hazard-mons, namely Froslass. I've found that stall does not want to be fighting with hazards on their side under any circumstances. I would change Xatu to either Hitmontop or Blastoise. Both help out with Weavile. Personally, though, I'd go with Blastoise to help out with Chandelure too. Your own amazing RestTalk set or the standard Foresight/RS/Scald/Roar both work well thanks to the amazing support of Chansey. Max D Blastoise seems redundant with Slowbro, so perhaps some SpD investment to maybe even full-out counter Chandy would be in order. If you want to go with Hitmontop, I'd do Intimidate Max D with: RS, CC, Foresight/Sucker Punch, Stone Edge. Sucker Punch is an option just to help a little with Chandy, who I really see as a big threat to this team. If you really don't like either taking the place of Xatu, I would consider making her Max SpD to deal with Roserade and Froslass more effectively. This wouldn't cause any larger problems because physical attackers basically just cannot break Slowbro/Gliscor. Though I truly believe Xatu's out of place on a defensive team and ought to be replaced altogether.

Well those are really the big things. Some other things I can think of are perhaps changing Chansey to Max Hp. From there you can go with the standard max D, but I would dump a little more into SpD for this team since, as I've raved before, Slowbro/Gliscor so effectively deal with the physical spectrum. One threat that seems unstoppable is CroCune. I'm curious as to how you deal with him at present.

Anyway, great team and good luck!

EDIT: Okay after playing with it I realized the real threat here is Roserade. If it's offensive it can rape a Xatu switch-in and if it's the defensive spiker it sets up in Chansey's face. What a fucking troll of a pokemon. Even the spiker set does damage to Xatu with Sludge Bomb with the current spread, and no matter how much SpD you give it the poison hax still is gonna by a huge annoying. Changing him to Blastoise or Hitmontop isn't gonna help this problem at all, especially not Blastoise. I don't know what easy change besides making Xatu specially defensive you can make to deal with this, and I'm now awestruck at how you got so high on the ladder with such a huge spikes Rosy issue. Another issue I noted before but now see more clearly is Froslass, especially in Hail. They easily get their spikes up against this team unless your prediction is absolutely pristine.