Remember that since fairies are immune to Dragon, if they switch into an Outrage you won't get locked into it, and if they switch into a Draco Meteor you don't have the SpAtk drop.
That said, the two sets that stand out are:
Bulky HydraRest
Goodra @ Life Orb/Leftovers/Expert Belt
Nature: Modest
Ability: Hydration
252 HP/252 SpAtk/4 Speed (Maybe some experimenting with the speed EVs is needed)
- Rain Dance
- Rest
- Hydro Pump
- Dragon Pulse/Draco Meteor
Basically just take hits like a champ, hit back, and when you get low, Rest. It's set apart from other Rest abusers because of Hydration. Vaporeon could actually run something similar to the same effect, actually hitting harder with Hydro Pump at the cost of 15 base speed, though, so it's usefulness is questionable. It's not necessarily outclassed, though, as it has better coverage even though it gets walled to hell and back by Ferrothorn.
Mixed Wall
Goodra @ Leftovers
Nature: Bold
Ability: Gooey
252 HP/252 Def/4 SpDef
- Toxic
- Protect
- Dragon Pulse
- Fire Blast/Sludge Bomb/Substitute/Infestation(?)
Mixed wall set over special wall set because special wall set is outclassed by a few other Pokemon. Being able to take physical hits synergizes nicely with Gooey, and Toxic + Protect always have enough utility to not be totally useless.
Mixed walls are pretty rare, but Dragon is actually a pretty nice typing for this since offensive Fairies should be hard to come by. Ice and Dragon type moves are your primary concern, but those are pretty rare since most ice moves were Hidden Power, which is going to be much less popular now, and only Dragon type Pokemon generally use Dragon type moves, so you should see those coming a mile away.
Of course, it still lacks tankiness for a mixed wall, but it makes up for this with two factors: the Gooey ability, which gives it some great utility in several situations as well as being useful overall, and his 110 base SpAtk. Toxic + Protect is a classic combo that you can't really go wrong with on a wall, Dragon Pulse is good damage and has STAB, and Fire Blast gives great coverage. Sludge Bomb is an alternative, letting you hit Fairies hard, but you'll be walled by every steel type ever. Substitute contributes to the stall nicely, while Infestation is more of a gimmicky move to trap them into the Toxic stall. I personally don't see that working ever, but it's a funny enough idea to include.
Wish support is highly recommended for this set.