Agreed^^ although you left out T-tar and Genesect but heck
yeah *votes for a redo*
Despite most, if not all, of the posters going for Deoxys-S, I still feel we should give Skarmory a chance. Since we (apparently) have most Kyogre covered, we can use Skarmory to counter EKiller, plus Groudon without Fire moves and all Tyranitar, allowing Spikestacking.
Another thing are things that wall Dragceus. Lugia is one of them, being able to Whirlwind you out with ease. Skarmory, however, can generally set up Spikes on Lugia, since they don't carry attacks generally bar Ice Beam, which only does around 22%. Even better, if you opt for Taunt, you can stop SubRoost Status Shuffler cold. Although Deoxys-S has Taunt too, it, as a suicide lead, will usually be dead by that point.
Yet another advantage of using Skarmory is walling Outrage. Physical Scarfed Dragons, such as Zekrom and Garchomp, will be forced to predict correctly, and Garchomp can't anything even with prediction. If Zekrom were to Bolt Strike the mispredicted Skarmory, they risk getting swept by Dragceus, since their only revenge killer just died. Skarmory can set up hazards to further assist Dragceus' sweep, weakening its checks, the best example being Kyogre.
Another point I want to bring up is weather sweepers, or more specifically, Excadrill. Skarmory walls it to no end, and phazes it out. Granted, this allows him to spin, but he'll generally take Life Orb damage, so if you keep Spiking and he (stupidly) keeps spinning, and die eventually. With Rocky Helmet (refer to my RMT: www.smogon.com/forums/showthread.php?t=3479183
), his fainting rate will be sped up. If he dies to Life Orb or Rocky Helmet (if applicable), iirc hazards don't disappear. However, despite this, I still feel we should run a spinblocker.