Reports of online games and their confirmations (Spring 2012 season).

FB achieved an easy victory thanks to the bolt, dealing 30 damage to each unit.

Was your Strength 70?

30 units have 2100 HP. Do you think that much Strength is needed for that?

To deal 2100+ damage with a bolt (lightning), you need a decent Magic skill:
With experience in Air magic (SP*25+50), the SP should be:
82 without the Air magic bonus
54 with the bonus
Quite a reasonable question, in my opinion.