5' Step to get close enough to attack. The bardic music should negate the fatigued penalty to hit (and damage), and I think he flanks the elemental with the crane, so another +2 to hit. I think I am remembering the elemental is Small, so no other bonuses. If I am wrong, please feel free to adjust the results.
To Hit:
Dice Roll: 1d20+7
d20 Results: 15 (Total = 22)
Damage:
Dice Roll: 1d10+3
d10 Results: 10 (Total = 13)