I am afraid I don't know what sort of effort is involved in adding to font encodings however.
As for use, I would probably make a second "palette" document and record common runes used there, then cut and paste as needed. I don't imagine using a lot of runes in sequence at once as they are not meant to be used in the same way as an alphabet.
-- John Machin "Nothing is more beautiful than to know the All." - Athanasius Kircher, 'The Great Art of Knowledge'.
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