There is no rule that says you have to match the guitar.As long as you have the low range covered,don't worry about it.I'd tune it to B standard and be done with it.
+1 eeeeeeeeg'zactly!
If a low B is tuned any lower than a B, you have to lighten up your touch drastically just to get a decent sounding note out of it......... maybe with a pick playin 1\4" from the bridge.... who knows.