-Marksmanship. She takes out Tsung with a shot, right through the neck, before he kills Meltdown. He also seems to have superspeed/reflexes and is an incredible martial artist.
Notice how she questions why they're tough enough to make her almost break a sweat
Now, here's one of the same future guys pwning Shatterstar. It helps a lot that he's studied 'Star's style, but, still, gives you appreciation for Dom's skill.
Ok guys, we're on to Domino's second solo... these scans are teh sex.
Domino: Perfect Weapon #1
-In a matter of minutes, she breaks into some high class facility, steals some stuff, kills some guys, leaps out, gets a snazzy bike, and rides off. They don't even know what hit them.
-Here she cracks a computer code with ease, dances and dodges through a laser field without breaking a sweat, and uses her powers/tech to crack a combination lock within seconds...!
-Remember how she was James Bond? Now her labtop explodes when the bad guys have it, and she flip-kicks the general and shoots out the lights in one move.
Notice how she seems to be fluent in multiple languages.
Also, at the begining of the fight with Deadpool he specifies that he doesn't want to use guns. In a gun fight, with Dom's powers, she would have the clear advantage... secondly, the fight shows that they're even until Wade distracts her.