I've been 4 times in the last 3 years, this has worked flawlessly every time. As an extension of this, Dominator is one of the rides that opens right at 10 when the gates open. I've always been able to squeeze a ride in between gate opening and 10:20 when they let the Platinum and KD Gold Passholders back into the park early. For that, everybody that wants in early meets back on the path behind the Eiffel Tower (about as far back as the fork going around Backlot in KI proximity).
But I would also recommend to go back to Dominator later in the day and wait for the front. You might not have the time to on the 10:00 ride.
Randoms tips: As a heads up, Shockwave and Avalanche open at noon. Grizzly is very under-rated, I loved it in the back. Volcano is always worth the extra 5 minutes for the front. If you stay til close, definitely ride 305 after dark. It'll close for the fireworks similarly to The Beast