Placidity
Chief Executive Officer
Jean Grey as in Phoenix? If so, she wins.
Assuming not, X-men are generally too slow.
Professor X(first class version)
- Assuming Bella's shield is effective, he won't be any use.
Magneto(first class version)
- Limited effectiveness, will die quickly. Could stay in the air, then he could possibly contribute.
Storm
- If she stays in the air, could do a little damage. Don't want to hear about cyclones, since she would kill friendlies.
Wolverine
- Slice and Dice a few, but gets KO'ed or incapacitated by venom.
Cyclops
- Could take out a few before dying.
Havok
- Same as Cyke.
Jean Grey(Last Stand Version)
- Dark Phoenix rapes. Normal Jean too slow + Bella's shield.
Emma Frost(First Class)
- Useless - Bella's shield and will get ripped apart easily.
Gambit(orgins)
- Too slow. Although could do some damage with constant AOE ground strikes to keep them at bay.
NightCrawler
- Kung fu won't do anything. Using his father's technique, he'll be useful.
Azazel
- A real threat. Could at least take out all the wolves.
Mystique
- Useless.
Sesbastion Shaw
- Major weapon. Hard to take down, physically invulnerable, and AOE energy attacks.
Riptide
- Possibly useful, but cannot target enemies only and extremely vulnerable.
Juggernaut
- Slow, but good distraction and could do some damage, especially against the wolves.
Shawdowcat
- Major threat, however may be taken down by Jane or Alec.
Beast(last stand)
- Useless.
Iceman
- Freeze the ground, make it slippery? Very vulnerable.
Overall, I would say Twilight wins, they are too fast, and too many. At most only half of the X-men are serious threats, and even then most are vulnerable. I'd say around 10 of them are useful. Compare that to the Twilight team, there are at least 60 of them, and that is a rough, very conservative estimate. Even without special abilities, they would win on physical stats and numbers alone.