Elf girl will make a spellcraft check to determine what spell was cast on her (and if it was arcane or divine if she can):
Spellcraft: 1d20 + 18 ⇒ (11) + 18 = 29
She will fire her bow at the Lamia who has not yet acted (Lamia 1 I believe), full attack using Rapid Shot and Point Blank Shot:
Attack 1: 1d20 + 11 ⇒ (14) + 11 = 25 Damage: 1d8 + 3 ⇒ (4) + 3 = 7 Plus Electrical: 1d6 ⇒ 3
Attack 2: 1d20 + 11 ⇒ (2) + 11 = 13 Damage: 1d8 + 3 ⇒ (1) + 3 = 4 Plus Electrical: 1d6 ⇒ 5
Attack 3: 1d20 + 6 ⇒ (16) + 6 = 22 Damage: 1d8 + 3 ⇒ (5) + 3 = 8 Plus Electrical: 1d6 ⇒ 2
She will then 5 foot step to V2