It is enough if you know exactly how to use them, your surely have to use wallet PIN for the wallets, but you don't add seeds by yourself, your wallets surely must have come with their seed phrase for recovery which you should back up in different places for better security.

A passphrase is a good extra layer of security in addition to your seed phrase, but do not use it unless you know what you are doing, if you add a passphrase and someone steals your seed phrase they will not be able to steal your funds, but if you lose your passphrase your funds are gone.