In a high fee environment, it actually makes sense to go into higher denomination pools.

For example, if you are gonna mix 1.1M sats, it’s much cheaper to mix in the 1M sat pool instead of the 100k sat pool due to miner fees.

Spitting your 1.1M sats into 10-11 pre-mix UTXOs then having those enter a mix is incredibly expensive.

Even with the lower flat rate 5k sat pool fee, it makes more sense to mix in the 1M sat pool with a 50k sat pool fee.