Hi ShakeItUp. We battled quite a few times on the ladder, back when you were using that Aqua Tail CBtar. At first this team just puzzled me, and seemed just a Ledyba short of Challenge Cup. But after seeing how effective it was in practice, and how well your team members lured and eliminated each others' checks and counters, I am totally converted. It's one of the most bizarre and intriguing, but also most potent teams on the ladder, really demonstrating how focussed creativity can lead to brilliant results.
Although it's hard to find real weaknesses, I think you lack safe switch-ins to pokemon such as Mamoswine, Metagross, and especially Air Balloon Heatran due to switching to the less bulky DD set on Tyranitar. To help against these threats, as well as Landorus, Gliscor, and Baton Pass mentioned earlier, you might want to try replacing Leftovers with Choice Scarf on Jirachi, and updating the EV spread accordingly - then replacing Salamence with DD Taunt Gyarados.
Gyarados (F) @ Leftovers
Trait: Intimidate
EVs: 52 HP / 252 Atk / 204 Spd
Adamant Nature (+Atk, -SAtk)
- Dragon Dance
- Taunt
- Waterfall
- Bounce / Double-Edge
In addition to having fantastic synergy with Tyranitar, Abomasnow, Gliscor and Jirachi, Gyarados provides you with another threatening setup sweeper to keep the pressure on the opponent. Scarf Jirachi means you still have a fast and versatile revenge killer.
But anyway, as much as I hate that Gliscor, this team gets my Luvdisc!