I think Drifblim could also decently utilize pinch berries, its immune to ExtremeSpeed and once it gets down to 3 subs you activate unburden and the pinch berry letting you pass evasion + stat boost of choice.
Deoxys-A @ Life Orb
EVs: 184 Atk / 88 SpA / 236 Spe OR 252 Atk / 20 SpA / 236 Spe
Lonely OR Rash Nature
- Psycho Boost
- Ice Punch OR Ice Beam OR Dark Pulse
A Physically offensive Deo-A may sound absurd at first, but the boost to its Attack stat allows its Superpower and ExtremeSpeed to become much stronger. For example, 184 Lonely boosted Life Orb Superpower OHKOes 252 HP support Dialga 81.25% of the time, whereas no investment Superpower completely misses out on the same KO. ExtremeSpeed also gets a power boost, now 2HKOing no investment Palkia and generally making Choice Scarfed mons a lesser issue. A Rash nature is recommended if your going to go and use the 184 Atk spread, since it powers up Psycho Boost to the point where its stronger then a naive one (and you get to 2HKO Great Wall Giratina-a with Ice Beam + Psycho Boost), but if your going 252 Attack its better to go Lonely and use Ice Punch since the move now OHKOes 252 HP Latias after SR (those with less HP investment don't need the SR). Give it a try :P.
This set also should be primarily credited to Theorymon, since I think he came up with the rash + 184 Atk set before everyone else.