Mage Fire Talents Builds

Improved Fireball (5 ranks)
Reduces the casting time of your Fireball spell by 0.1 sec.
D: Up to a 16% dps increase.
E: No effect.
S: No effect.
C: No effect.
=: No other way to reduce Fireball cast time in this manner.
PvP: ***
Raid: *****
Level: ****
Notes: Great for raiding and levelling; the 3s cast time on Fireball makes it of limited use in PvP (aside from sniping situations a la Alterac Valley).

Impact (5 ranks)
Gives your Fire spells a 2/4/6/8/10% chance to stun the target for 2 sec.
D: No effect.
E: No effect.
S: No effect.
C: A chance to stun.
=: No other way to obtain a chance to stun on Fire spells.
PvP: *****
Raid: ***
Level: ****
Notes: Incredibly powerful in PvP as nothing is more frustrating than not being able to do anything to counter a mage. Not so great for raiding since many mobs are immune to stuns. Combined with an AoE fire spell, it has the potential to stun multiple targets.
Use With: Flamestrike, Blast Wave

Ignite (5 ranks)
Your critical strikes from Fire damage spells cause the target to burn for an additional 8/16/24/32/40% of your spells damage over 4 sec.
D: Your crits will now do 210% damage (over time) rather than just 150%.
E: No effect.
S: No effect.
C: No effect.
=: No other way to obtain this effect.
PvP: ****
Raid: ***
Level: ***
Notes: Dispellable.

Flame Throwing (2 ranks)
Increases the range of your fire spells by 3/6 yards.
D: Your damage spells now can hit from further away.
E: No effect.
S: No effect.
C: No effect.
=: There's no other way to increase the range on your fire spells.
PvP: ****
Raid: ***
Level: ****
Notes: The extra range on Fire Blast alone makes this talent worth it; the fact that it also works for Scorch and Fireball is icing on the cake.
Use With: Fire Blast, Fireball

Improved Fire Blast (3 ranks)
Reduces the cooldown of your Fire Blast spell by 0.5/1/1.5 sec.
D: You can use Fire Blast ~23% more often.
E: No effect.
S: No effect.
C: No effect.
=: No effect.
PvP: ****
Raid: ***
Level: ***
Notes: Now only 3 points, this talent is well worth it for almost any Fire mage.
Use With: Flame Throwing, Incinerate, Ignite

Incinerate (2 ranks)
Increases the critical strike chance of your Fire Blast and Scorch spells by 2/4%.
D: +4% crit on Fire Blast and Scorch
E: No effect.
S: No effect.
C: No effect.
=: Equivalent to 4% crit gear; the talent is limited to only improving Fire Blast and Scorch.
PvP: ****
Raid: ***
Level: ***
Notes: Useful for a PvP Fire Mage; as well as for PvE mages built around Scorch/Fire Blast.
Use With: Improved Scorch, Ignite, Improved Fire Blast

Improved Flamestrike (3 ranks)
Increases the critical strike chance of your Flamestrike spell by 5/10/15%
D: +15% chance to crit on Flamestrike
E: No effect.
S: No effect.
C: No effect.
=: Equal to +15% crit gear; the talent is Flamestrike specific however.
PvP: ***
Raid: **
Level: **
Notes: Try a PoM Flamestrike followed by a Blast Wave -or- Flamestrike, followed by Blast Wave and Nova CoC. Basically this talent enhances your AoE damage abilities. Not that useful outside of PvP.
Use With: Presence of Mind, Blast Wave

Pyroblast (1 rank)
6 sec cast/35 yd range - Hurls an immense fiery boulder that causes 716 to 890 Fire damage and an additional 268 Fire damage over 12 sec.
D: A harder hitting, longer casting, Fireball with a long DoT.
E: No effect.
S: No effect.
C: No effect.
=: No other way to learn Pyroblast.
PvP: **
Raid: **
Level: **
Notes: In PvP, this talent is pretty worthless without PoM; for levelling it's a decent opening shot... There is no cooldown on this spell any more. The DoT on this spell is handy vs. rogues, provided you can sheep them to set up the long cast time.
Use With: Presence of Mind

Burning Soul (2 ranks)
Gives your fire spells a 35/70% chance to not lose casting time when you take damage and reduces threat by 15/30%.
D: No effect.
E: Far fewer interrupts on Fire spells.
S: No effect.
C: No effect.
=: The only other ways to reduce lost casting time from damage is via Power Word: Shield, Ice Barrier or similar damage absorption/immunity spells and effects. This talent is the only way of getting any threat reduction on Fire spells, aside from much smaller reductions possible through some very expensive enchants.
PvP: ****
Raid: ****
Level: **
Notes: A solid talent for PvP and PvE. Scorch, with its short cast time, will rarely have its cast time set back due to damage.
Use With: Scorch

Improved Scorch (3 ranks)
Your Scorch spells have a 33/66/100% chance to cause your target to be vulnerable to Fire damage. This vulnerability increase the Fire damage dealt to your target by 3% and lasts 30 sec. Stacks up to 5 times.
D: Up to 15% extra damage on all Fire spells.
E: No effect.
S: No effect.
C: No effect.
=: No other way to get this effect.
PvP: **
Raid: *****
Level: **
Notes: It's worth having at least one Fire mage in your raid have this talent, so that all Fire Mages and Fire-using Warlocks can get 15% extra damage.

Improved Fire Ward (2 ranks)
Causes your Fire Ward to have a 10/20% chance to reflect Fire spells while active.
D: No effect.
E: No effect.
S: Might help in fire heavy areas, but I doubt the ward will last long enough.
C: No effect.
=: Similar to Engineering's Flame Reflector.
PvP: **
Raid: *
Level: *
Notes: The talent is sort of at odds with the ward; if you're taking damage, the ward will get used up, and then you won't have any chance to reflect Fire spells. So you might get lucky and reflect back a big Fire spell; then again, you might not. All in all, there are better places to spend points once you consider how few sources of Fire damage there are in PvP (mages, locks, shamans) and that most things that deal Fire damage in PvE are immune to it.

Master of Elements (3 ranks)
Your Fire and Frost spell criticals will refund 10/20/30% of their base mana cost.
D: No effect.
E: A weak version of Clearcast. You'll need over a 30%+ crit rate to have equal or greater returns.
S: No effect.
C: No effect.
=: No other way to get this particular effect.
PvP: **
Raid: ****
Level: **
Notes: You can, of course, get both MoE and Clearcast... If you do get this talent, include gear and talents that raise your crit raid.
Use With: Incinerate, Critical Mass

Critical Mass (3 ranks)
Increases the critical strike chance of your fire spells by 2/4/6%.
D: 6% more crit on all Fire spells
E: No effect.
S: No effect.
C: No effect.
=: Equal to 6% crit gear.
PvP: ****
Raid: ***
Level: ***
Notes: A solid talent on its own. Critical strikes do have added threat and thus aren't overly desirable in raiding.
Use With: Master of Elements, Ignite

Blast Wave (1 rank)
Instant/45 sec cooldown - A wave of flame radiates outward from the caster, damaging all enemies caught within the blast for 462 to 544 Fire damage, and dazing them for 6 sec.
D: Another instant cast PBAoE.
E: No effect.
S: No effect.
C: Another instant cast snare.
=: The only way to get the spell.
PvP: ****
Raid: **
Level: **
Notes: The 'daze' mentioned in the talent description is basically a 6s duration 50% snare. Mostly useful in PvP.
Use With: Ignite, Impact, Critical Mass

Fire Power (5 ranks)
Increases the damage done by your fire spells by 2/4/6/8/10%.
D: A flat +10% damage increase on all Fire spells.
E: No effect.
S: No effect.
C: No effect.
=: However much +dmg gear is equivalent to 10% more.
PvP: ****
Raid: ****
Level: ****
Notes: More damage is good, and this talent applies its multipler to your +dmg gear, which means it scales as your gear gets better.

Combustion (1 rank)
Instant/3 min cooldown -When activated, this spell causes each Fire damage spell you cast to increase your critical strike chance with Fire damage spells by 10%. This effect lasts until you have caused 3 critical strikes with Fire spells.
D: Basically guarantees 3 crits within 7 casts.
E: No effect.
S: No effect.
C: No effect.
=: No other way to obtain this effect.
PvP: **
Raid: ****
Level: ***
Notes: Best used for sustained dps situations.