If you find DD too slow, it probably means you are playing at a table with at least 3-4 others. Spreading at a game like that 1-2 or even 1-4 is a losing proposition - not enough rounds being dealt.
The only Strip DD game with MSE I'm aware of is at MB. You can wong in once or twice, but that's about it. Just because you're losing, doesn't mean they aren't watching you and will tolerate further play. Time your exit by the number of min to max bet spreads you make. After 2 or 3, get out of there, regardless of a win or loss.
If you want to play good fast DD games, go to the place with the dancing fountains. Min will be $50 during the day. If mins are $100, ask and they'll probably let you play $50. Spread 1-8 and play a very short session, spreading to max once, maybe twice, if you don't intend to go back there later in your trip. Otherwise, stick to the shoe games.
LV isn't the AP heaven you thought it would be, is it? That's why I posted the "Vegas sucks" thread a few weeks ago, when I returned from my last trip.