Ive used NU in UU alot and this is what works for me;
i think balanced teams are the way to go.
Try some quirky strategies, something teams might not be prepared for. Toxicstalling Articuno can catch teams out, so can Venomoth (o i love my Venomoth), double powder jumpluff did wonders for me. note: some of them may need Rapid spin support, which is difficult due to poor rapid spinners.
Slap a scarf on something like primeape/hitmonchan/hitmonlee/zangoose/tauros (probably doesnt need a scarf) and you have a good revenge killer who might even catch afew surprise kills.
To stop the powerful UU pokes overwhelming you balance things out using some sturdy pokes; lickilicky, slowking, quagsire, probopass, noctowl, gardevoir, vileplume, regiice,miltank, cradily, p2. notice: i think there is a lack of good physical walls in NU (or at least a lack of variety) and too many are normal type, revenge killers will often be making up for poor defense.
Also need a good lead. Alot like Jumpluff in UU, some use Jynx, i recommend Persian.
There are lots of other pokes that work well that i havnt mentionned; magmortar, espeon, manectric, entei and many others.
As i said i generally prefer balanced teams when using NU, the main point of my post is to show how some of the pokes we have mentionned in this thread can work together. So here is my example team;
Persian- Banded limber. Taunt, Bite, Return, Switcheroo. Taunt Uxie and it cant do anything (even tricking a scarf doesnt help much)
Lickilicky- Special defender that can take some hits from mismagius, raikou, zam (Moltres hits abit hard). Wish/Protect with Return and fire punch/aqua tail for ghosts.
Quagsire- physical defense, SRer
Hitmonlee-scarfed revenge killer. Limber is useful to get a free switch but only if really needed.
Venomoth-lefties. Sleep, roost, Bug Buzz, Sludge Bomb (this is my favourite poke atm), x4 fighting resist can help bring it in aginst hitmontop if needed (watch out for stone edge)
Gardevoir- an underated special attacker. Trace so can check rain teams. Scarf, specs, orb, w/e the item is variable
Or replace Quag/Gard for Sandslash/Articuno.
(that team may not work well, i just made it up)
As i say, this is just to show how taking a balanced approach might work. there are plenty other ways to do things.