Hi! Currently hanging out at ~1450 on the Anything Goes ladder. Some tips:
1) Iron Head is not worth it, like, at all. Dragon Ascent will do all the damage you need without wasting the slot. Earthquake is much more worth it to hit Primal Groudon. Also, the only thing Dragon coverage actually gives you is good damage on Giratina, who can burn RayRay out anyway. Outrage is worth getting rid of - Swords Dance is easy setup-into-sweep, Overheat+Earthquake kills anything you'll see that resists Dragon Ascent, and Substitute turns Klefki into hard, hard fodder. With Sub, Life Orb is better being replaced with Lefties.
2) I would run sash on Klefki, as it means it doesn't die when you try to paralyze a Lum Berry RayRay, which is what I use. For the fourth slot, Toxic. Toxic can and will poop on defensive threats, which entirely means Lugia, who is still very very strong in AG.
3) Precipe Blades, despite its accuracy, is worth it over EQ. +20 base power turns out to be a lot.
4) Darkrai is a crutch in my opinion. I would entirely get rid of it, since you have no hazard remover he becomes dead weight the moment the sash is down. My personal recommendation for that slot is Deo-S or Deo-D. Setting up stealth rocks early is very important because it breaks sashes and few people have hazard removal. Mental Herb Deo-D with rocks, taunt, and dual screens is a great way to open up a Ray sweep, even if it only a one-time use.
5) I see nothing wrong with this set, so instead I have a bit of advice: kill all Lugias before you set-up. Even at +2 Thunder is only a 3HKO on the physically defensive sets, and one Whirlwind makes Xern a lot, a lot weaker. Lugia is a god in Anything Goes, even at +2 Mega Ray only has a chance to 2HKO Lugs.
6) Chansey is not good enough for AG. It can't do crap to most opponent, still dies very easily to any physical hit, and is absolutely crippled by Knock Off. Minimize is also very gimmicky and basically puts Chansey's life into luck, more so than Swagplay. If you need a specially defensive Pokemon, use Giratina, and you really don't need one. I would use that slot for a Fairy killer like Choiced Genesect. Lugia + Cleric Fairy type is threatening to you because your only Lugia threat is Toxic. Being able to scare away those fairies make your Lugia clearing a lot easier.
Also, as always, up until ~1300 there's a lot of crap involved. On two occasions, for example, I've seen Bulk Up / Swords Dance / Aura Sphere / Flash Cannon non-mega Lucario. Once you get out of the lower ladder (home of six SwagPlayers and its ilk, among others) it will actually start to be challenging. And then, it's like Ubers+.