I have read it over and over again, on the forum but it is still unclear to me...
Because to me it seems the forum sais as though, you still get the treat for every surge u spent, regardless of spending it for range and damage.
So it means rolling 3 surges with a dark priest against a legal target is + 3 damage +3 range and 3 treat aswell ( all of the benefits).
If that is so i think its a bad rule, or at least really unclear.