Double edit: Actually, I was remembering the stage correctly.
I'm going to guess that you've decided to come back later for Zoroark, and that you probably aren't willing to bump heads against Gengar until you get a favorable game.
If both of those are true, then I'd say your best team involves swapping out for Zorua or Misdreavus. Liepard's effect is useless on this stage, as barriers for some reason do not count for its ability. However, Zorua (especially since it sounds like you don't feel like attempting to capture Zoroark) and Misdreavus would be quite useful on a successful proc for entirely different reasons. Absol is very useful for this stage. Sharpedo can help you pick off any stray Haunters that Gengar's disruptions don't erase for you. Personally, I don't think M-Sableye's Mega effect is all that great, so it might be worth opting for a neutral Mega like Mawile or Ampharos, as their ability to generate combos will be of great value to you.
As for items, if you've been getting close on your own, Moves +5 should be enough for a clear, and DD enough for a decent capture rate. If not, I'd say go all in with both Moves +5 and DD. Mega Start is not necessary for this stage.