I advise against using your WB song as primary for yourself either.
Wouldn't you rather be singing something else to help your group? Group
with someone that can cast it - but keep your WB song memmed - it's a nice
backup to save someone's life. If you hear the gurgling drowning sound -
fire it up right away. I've saved ppls life before.
The Singing Steel Gloves are really nice to have permanent WB. I did a
raid Kedge Raid a couple of weeks ago (Damn Phin didn't spawn - and was due)
and it was really nice to not have to worry about it.

Slyde