Having a bit of trouble...
Deoxys-D, Leftovers
Calm Nature
252 HP/176 Def/80 S.Def
Pressure
Recover
Cosmic Power
Ice Beam/Toxic
Thunderbolt/Superpower
Was trying to make a Deoxys-D that could boost it's defenses higher, but still be able to attack. I was thinking of Toxic, but Steel-types became and issue...
The thing is, Cosmic Power really only gets you into an enormous stall war. You can't really hurt your opponent besides trying to toxic them, and even then you're totally walled by steels. None of your attacks will hurt enough to KO anything, so you're basically relying on toxic to deal damage. I'm not too experienced with Ubers, but I'd say it's probably not a good idea.
Was thinking of making a clefable for a staller/blissey counter
Clefable@ leftovers
252 hp/252 def/ 6 speed
Relaxed
-drain punch
-protect
-toxic
-softboiled
Drain Punch with no attack EVs isn't even a 2HKO on Blissey, so you won't be able to beat it. This set is also totally walled by steel types >.<