Binance has low fees if you will use BNB to pay transaction fee. FTX is once the best exchange for trading derivatives because it has a very low base maker and taker fee and you can have discount up to 60% if you hold certain amount of FTT tokens). I think Bybit and Binance is currently the best exchange for trading derivatives because they have a low base fee and can be discounted using their native tokens.

I suggest to invest on exchange native tokens if you really want to save a lot of fees on trading especially on derivatives that has a very high fee due to leverage.