Ok since the coin join implementations are pretty much gone. Here's a privacy technique that could work.

- Get Zeus or Blixt Wallet. Buy inbound via LSP. They open a private Taproot channel.

- Stack sats on lightning.

- When balance is all on your side, close it. It's a Taproot channel so nobody would know it's a channel close.

- move funds to cold storage when fees are low.

- once you think your pubkey has been exposed enough, delete the wallet and start over with a new pubkey.