Also, whoever said that Immolation isn't worth upgrading to Adept III was insanely wrong. The DPS of Immolation at the Adept III level is quite good, and the damage per mana is tremendously better. BoFL has a terrible damage per mana ratio compared to a spell like Immolation.
I actually have Master I Immolation and it's one of my favorite spells to use, especially during raids, since the damage is spread out it draws less aggro all at one time.