I have to ask how does your team deal with the new common teams that contain magenzone and two dragons? As soon as skarm and rachi are gone your team is wide open to getting hit hard by CB Haxorus, Another SD garchomp, Life orb or Specs Latios. Slowbro would do ok for the haxorus and garchomp although with CB or +2 even he won't last long. Considering bringing in Haxorus could force you to go to skarm the opponent double switching wouldn't make it hard at all to take out your skarmory. Not to mention that the opponent still has 3 other pokemon that may do well against your team. Its still pretty solid with reun and slowbro taking hits and doing some damage back but choice pokemon using non stat reducing stab moves with magnezone as a partner on their team can take out your teams best defenses leaving you very open.
You can probably still predict and maybe get sub up with garchomp however which still gives you a chance but you now have nothing to slow down latios considering that slowbro is 1hkoed by DM and can't switch in. I am not trying to set up too much situational cases, but magnezone with dragons is becoming very popular. Your team is very good though.
To solve this problem you may want to consider uturn on jirachi so he won't be trapped in on magnezone allowing you to have an advantage agaisnt specs magnezones, which would allow garchomp a free sub. Substitute magnezones are harder to counter because you can never be sure what hidden power they have unless you see an obvious weakness in their team to steels that can handle his stab or ground/dragon types (considering they share the common weakness of ice exepct for about 4).
Hopefully this would give you a better edge against a team like this and allow you to maybe lose skarm but not be weak to fast Life orb attackers that can constantly blow at your team. Slowbro can handle scarf chomp for you and now your team is stronger against the combo I mention by adding uturn to jirachi. I would probably take off protect considering Rachi is going to flinch/ para the opponent.
Good Luck getting voting rights!