Hi guys

who know a good dex and a good decentralized wallet also with reduced gas costs and where we can not only store eth and erc-20 ?
As far as I know, there are no DEX that can help you to reduce your transaction fee on ERC20, any of the DEX wallet under erc20 surely they will give a high transaction fee to anyone who will make a transaction whether it is deposit or withdrawal. Though, there are a lot of options for you to use for this matter dude such as Uniswap, and sushiswap I guess.