Ok, as far as I see, you want your Mienshow to be a Sashbreaker / Phys Sweeper Mid-to-Lategame. That's good because you have a priority move on it and U-turn w/ Regenerator is a great choice.
Togekiss is fine. Having a pokémon with a 60% of flinch per turn (especially if they intend to recover or sweep w/ boosts) and 33% Paralyze, tends to put odds not in their favor. Good for disturbing the flow of your opponent.
As for Swampert, I believe going a mix of Offensive and Defensive is dangerous, given that you have no reliable form of recovery. Sure you have leftovers, but if it gets knock-offed, you are screwed. So based on the rest of your team so far, I would recommend changing your movepool. I would change it to that of a Mono-Attacking Swampert. Modify your EV spread to 252 HP, 4 Def, 252 SpD. Movepool: Rest, Sleep Talk, Curse, Waterfall.
Alomomola is also good, because you get to stall with residual toxic damage and pass Wishes to injured team members. The reason I changed your Swampert set is because if you get hit hard and are forced to switch, you can easily wish up Swampert to full health and Curse again later in the game. If your Alomomola dies, Swampert is bound to fail. That is why I changed his set.
Lililicky. Plain and simple. They will never know what hit them. And yes to Choice band. Rack up more unexpected damage for potential 1HKOs.
Gengar does not need a Focus Sash. It's just unnecessary. I would run Choice Specs for more damage. Replace pyschic with Focus Blast, as it allows way more type coverage. And as for Destiny Bond, replace with Trick for the pesky annoying walls such as Blissey, Dusknoir, or Gliscor; being that Choice Specs will not boost their damage (since they are walls and doubtfully will have high SpA)
Overall, I see where you are going with this team. You may need to tweak this strategy after playing against different teams, seeing what you need to do to keep your members alive. Try to focus on the basics: Type Coverage, Status Inflictions, Choice Items, Type Variety on your Pokémon, Recovery moves, and Priority moves. As for this team, I feel I have evaluated it well enough. Good luck in the future
