lol, well to you, I say I've only been an 80 mage for a week. I was just sharing some general 'new 80' shit that I distilled down from my recent experience.
The power of FFB is that it can take advantage from fire and frost tree damage bonuses for huge damage on criticals. From
elitist jerks' "The Frostfire Bolt Thread":Frostfire bolt with ignite + burnout + ice shards + CSD: Critical damage bonus 330.75%
CSD is the
Chaotic Skyflare Diamond
I levelled entirely as a frost mage til 80, with Torment the Week from arcane after a mid-70s respec (
looked about like this at 75.) I loved my multiple layers of security blankets (elemental, ice barrier, rediculous snares). If Fireball is working well for your playstyle now, probably stick with it. Supposedly Fireball/arcane is one of the top DPS specs anyway, just very mana hungry.
edit: I have switched to a pretty typical FFB spec now for more raid/instance damage. It plays quite a bit different than my frost spec did.
Here's my armory