OK, for the sake of the discussion about layering the process of mixing, let's use JoinMarket instead of centralized mixers/tumblers.
- If a Dark Market user sends his UTXOs to himself/herself through Lightning, then use JoinMarket, then send his UTXOs again to himself/herself through Lightning, THEN mix them through WasabiWallet.
Will blockchain analysis detect that it's a layered mix? I believe the connection to those original Dark Market UTXOs would be gone, no?
If a black market user sends his coins to himself with Lightning, then blockchain analysis won't even be able to determine that the coins moved at all (while the channel is open).