If SkarmBliss is dismantled by Mewtwo (although SpD Jirachi in the rain is like the only thing that walls Mewtwo? @_@) then what makes a good partner for Skarmory?
Also this might be better suited for the CCAT thread, but: from my playtesting, I'm close to concluding that Deoxys-A is a bad Pokemon. It can't take a hit, so it needs to OHKO its targets. But it can't OHKO its targets. Not only is it relatively easy to play around (mispredict and it dies, etc), at full health there are plenty of Pokemon that survive and hit back: most Arceus formes, Kyogre, Dialga, Lugia, etc etc. The self-inflicted stat drops are maddening, not helped by the fact that you can't NOT run Psycho Boost / Superpower (I tried giving up Psycho Boost once, and then 252 SpA +ve nature LO Psychic fails to OHKO a Thundurus ...). Deoxys-A gets Extremespeed, but the damage output is extremely weak. Hitting 30% on Arceus is simply not good enough.
The only way Deoxys-A is going to nuke anything is if it gets massive amounts of hazard support, but the amount of support you need to invest then - Ferrothorn / Forretress / Skarmory + Giratina / Giratina-O / Ghost Arceus - leaves you vulnerable to many other threats. After all, you are playing one Pokemon down. Deoxys-A will not be able to switch into anything other than support moves, unlike for example other offensive Pokemon like Darkrai, who while by no means bulky it can switch into Giratina-O's Shadow Sneak, among others. What's more, if you can get that amount of hazard support down, you could equally sweep with Darkrai or Mewtwo or something, who can actually set up their own sweeps and / or attack without having to lower their own stats ...
I guess the other thing to do with Deoxys-A is to break down walls, but you could achieve the same thing with Choice Band / Choice Specs and still have more resistances to use. Finally there's leading, but although I'm fully with shrang that people don't prepare for Deoxys-S anymore (my own team doesn't, lol), but team preview does go a long way to eliminating the lead metagame.
Someone tell me what Deoxys-A can do better than everyone else ... it just seems to me like it's only good for the case where you've already used all the better sweepers you can find and you still need more offensive power (i.e. you're playing heavy offense).