How to use Pangea songs?

[Beorne]

I'm a player of EA Pangea. I'm trying to use the powerful nature 1 songs but I'm not able to cast them. I see that they have a range 0 and aoe of 15. But even if I put my caster very near (2 or 3 squares) to the front line he can't cast them.
What does this mean, the only way to cast the songs is to be first line and soon completely sutrrounded by the enemy and die heroically?
Or be flying rear the enemy lines, cast it and retreat (Pan has not good flying casters ... no one apart a strong hero and empower a harpy scout seems bit too costly).
Or I am missing something? Someone ever cast some song?