I would think a good team would be-
Ninja
Sandlashed Survivor
Frozen Banshee
Skullcrusher
Lightsworn
Frozen Banshee and Ninja most likely will need Lifesteal gear to stay alive, and they will produce most damage through Poison, HP Burn, and Decrease Defense. Skullcrusher will help as a Stun target and will bring Ally Protect and Counterattack. That, along with Lightsworn's Increase Defense can be extended by Sandlashed, who has her Passive to keep you going a bit further. Lightsworn's Revive On Death will help as well, along the the Decrease Attack debuff which is very important.
If your team can go at a fast enough Ratio that it doesn't require Sandlashed's Extend Buff Duration, I would recommend subbing in Longbeard.
That's a nice team Destroyer is suggesting! Maybe give it a shot!
You could also try:
Rhazin: Decrease Defense, Weaken and a very hard hitter, especially with Giantslayer Mastery
Grush: Decrease Attack, A1 Leech, enabling you to not worry so much about lifesteal gear
Skullcrusher: Stun target, Stun Cleanser, Ally Protect, Counterattack
Ninja: HP Burn, a 2nd Dec Def to keep it up more and really good sustained boss damage. I'd get him up to 6 for the Warmaster procs.
Kael/Frozen Banshee: Poisons are awesome! Use Kael while you're gettign Frozen Banshee done and fully masteried.
As far as stats for NM, you'll want 171 speed at least on everyone to go 1 for 1 with him. Rhazin, Ninja, Grush and your poisoner you'll want to also have 200+ accuracy to reliably land those debuffs you need. Then start getting those defensive numbers up, 2700+, preferably 3000. Crit Rate and Crit Damage on your damage champs, Ninja, Rhazin and the poisoner.
i want to thank you guys for giving me some suggestions. I will try that comp tomorrow and get back with you all. So fst teh nost i hsbe been able To get on NM is about 13.8 million. With the players i have and an okay Great Hall, i am not sure why i am not able to two key it. Once again i really appreciate your time and kindness you have shown in taking time out of your day to help a stranger .