Here's a fairly new Frostfire video (sadly no crits):
YouTube - WoTLK spell: Frostfire Bolt
The guy is nude, except T6 head, bracers and unknown shoulders and from what i can tell he's lvl 80 and has all talents.
I did some napkin math to see which talents affect the damage of Frostfire Bolt.
It doesn't really prove anything, it's more a confirmation of known facts.
Please Note: There are a few unknown factors involved and to be honest... my TC sucks, so i'm not sure if my math is correct.
Unknown Factors:
-Trinkets and other non-visible equip.
-Does he really have all talents ?
-Spell damage & stats of the shoulders.
-Something obvious i missed...
Frostfire Bolt 722 to 838 damage, 3 sec casttime
-> 780 avg. Dam
81.43% spell damage coefficient (snare effect).
Bonus spell damage:
Mind Mastery:
int/0,25
int=184 (Lvl 80 + AM, assumption) + 14 + 28 + 25 ( Equip, i assume 25 int for the shoulders) = 251 int
227/0,25=56,75
-> 62,75 dmg
Equip:
39 (bracers) + 62 (head) +50 (shoulders, assumption)
-> 151 dmg
62,75+151 = 213,75
213,75x0,814 =
173,99 bonus spell damage
780+173,99 = 953,99
x1,03 Playing with Fire
x1,1 Fire Power
x1,06 Piercing Ice
= 1145 avg Damage
->The average Frostfire Bolt hit for our guy should be around 1145 Damage
if FroFi (i really like that acronym) is affected by the talents mentioned above.
Frostfire Bolt hits:
1207
1188
1183
1140
1130
1156
1181
1132
1157
?
~1163,7 avg. damage
That's pretty close to the predicted avg. damage of 1145.
Conclusion:
Takeing into account that a few unknown factors are involved, i'd say we can be reasonably certain that Playing with Fire, Fire Power and Piercing Ice affect Frostfire Bolt.
No big surprise.
€dit:
Spelling and grammar... ah well they suck anyway...
€dit2:
I assumed 160int for a lvl 80 Mage with Arcane Mind (too low) & found a minor error in my calculation.