I might do something like that. I don't think I would put Giga Impact on both of them, though. Here's what I think they'd end up looking like...
Glaceon @ NeverMeltIce (if it's not on Abomasnow)/Air Balloon (if I take Earthquake on Abomasnow)
Snow Cloak
252 EVs on Sp. Atk, 252 EVs on Atk, 4 EVs on Speed
Moves:
1. Giga Impact
2. Blizzard
3. Aqua Tail
4. Shadow Ball
I ended up focusing more on offense rather than defense. If I chose to hit hard right at the beginning, then this combo is for me. I have little defense, but with a STAB Blizzard with 100% accuracy boosted by a Hail and potentially a NeverMeltIce (not to mention a potential super-effective hit) is nothing to mess around with. Glaceon could completely dominate the field, but it would have to do it at the risk of a) missing an attack or b) not moving first and fainting.
Abomasnow @ Focus Sash/NeverMeltIce
Snow Warning
Brave Nature (+Atk/-Spe)
252 EVs on Sp. Atk, 252 EVs on Atk, 4 EVs on HP
Moves:
1. Blizzard
2. Grass Knot/Wood Hammer
3. Earthquake/Hidden Power Fire
4. Rock Slide
I'm not quite sure how this would work out, but I focused this Abomasnow on attacking rather than defending. Assuming I use the Focus Sash, I should be able to get at least 1 solid hit on my opponents, and that'll prove to do a lot of damage. If I do end up giving Glaceon the Air Balloon, I can potentially get an Earthquake in without worrying about fainting Glaceon.
So, this is what I'm thinking. Would it work, or is it just me rambling on about something that never has a chance?
---------- Post added 08/05/2013 at 04:01 PM ----------
Added a few more Pokemon! Doubles strategies were added last night, some singles were added just now.