How does it sound?
Fiver's are a bit unusual to begin with as that low B seems to just get in the way or acts as a good thumb rest until you figure out what it can do.
Playing in 5th to 7th position is a good place to hang out as that lets you get down to a low fretted E and helps you become accustomed to the additional stretch before venturing down for some of the lower notes down near the nut.
As others have hinted at, Bass can be broken down into a lot of patterns that are transfered up and down the neck as well as across the strings, hence why most go for a high C rather than a high B on a 6 string Bass. Also nothing stopping you from keeping traditional low EADG and run high B or C on a fiver. It all depends on how you want to use the extended range, for lower or higher notes.

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