The best DEX is ViteX built on Vite (this is DAG project, like IOTA but with smartcontract). And they share 90% of revenue from trading fees to token holders (10% for owners). And this DEX is for multi blockhains.
Have you heard about uniswap, it's a dex exchange, currently lots of coins in there are doing x5 - 100, to me its consider the best Dex for now because it's really easy to navigate through, lots of people have been made awesomely rich from that exchange
Only thing I know about it, is that you cannot trade BTC on it, which is the main pair for everything no matter where you go. It's great to see that it has a lot of volume though, as it means there is demand for trustless trading. Blocknet being one of the most decentralized in existence.