http://web.archive.org/web/20140228143436/www.db.pandawow.me?spell=85673
So, the damage should be lower than healing. If you take a look on comments http://web.archive.org/web/20140210075043/http://www.db.pandawow.me?item=41107#comments, players there noted incorrect "approximately equal" part, because it's not true.
Also, our formula for this spell actually was slightly higher than intended (around 40% of spell power). Changed to 37.7%, check after update.