Frostfire vs Fireball (patch 4.0.1)

Here are the glyphs for the two spells:

Glyph of Fireball
Increase the critical strike chance of your Fireball by 5%.
http://cata.wowhead.com/item=42739

Glyph of Frostfire
Increases the damage done by your Frostfire Bolt by 15% and your Frostfire Bolt now deals 3% additional damage over 12 seconds, stacking up to 3 times, but no longer reduces the victim's movement speed.
http://cata.wowhead.com/item=44684

As a Fire Mage, here are the other viable glyphs:

Glyph of Pyroblast
Increases the critical strike chance of Pyroblast by 5%.
http://cata.wowhead.com/item=42743

Glyph of Living Bomb
Increases the damage of your Living Bomb by 3%.
http://cata.wowhead.com/item=63539

Glyph of Molten Armor
Increases the critical strike chance provided by your Molten Armor by 2%(? I believe it's 2%, but Wowhead is reading 0%, which is obviously wrong).
http://cata.wowhead.com/item=42751

Glyph of Mage Armor
Your Mage Armor regenerates 20% more mana.
http://cata.wowhead.com/item=42749
(I've heard rumors that mana will be an issue for Fire Mages, but I since I haven't heard this from anyone with a good source or who was able to tell me if this was in ICC or in leveling from 80-85, I'm not sure if I believe them.)

I believe having Glyph of Frostfire and Glyph of Fireball would lead to higher DPS than any other two, since you'll want to get Frostfire to 3 stacks (according to some research at EJ, 3 stacks of Frostfire will yield enough DPS to be worth the glyph) and then switch to Fireball for the extra crits. However, my third glyph choice is what I'm struggling with:

Glyph of Pyroblast - Since Pyroblast can itself proc hot streak, this could lead to chains of Pyroblast that we oh so love as Fire Mages.

Glyph of Living Bomb - I don't believe the increase in damage here is as substantial as the increase we'd get from Pyroblast, since a crit'd pyroblast will hit like a truck while providing us with more hot streaks.

Glyph of Molten Armor - This is the smallest yield in crit chance you can get with any of the glyphs. Probably not worth it.

Glyph of Mage Armor - Again, I don't believe mana will be an issue. If it does, this glyph might become mandatory.

My conclusion is that if you're spec'ing fire, you should be aiming for as many Hot Streaks as possible, so the glyphs I believe I'll be going with are:
Glyph of Frostfire Bolt
Glyph of Fireball
Glyph of Pyroblast

However, I think there are some important things that must be considered (and thus discussed):
Will Glyph of Fireball be useful or will trying to keep the Frostfire DoT take too much time away from casting Fireball?
Will we be hot streaking enough for Glyph of Pyroblast to matter anyways? I'm thinking yes, since our crit won't take a huge hit until we hit lvl81. When I tested on the PTR, I wasn't noticing a huge crit shortage.
Is the sustainable and reliable damage increase from Glyph of Living Bomb worth the loss in crit from our Glyphs of Fireball/Pyroblast? As I said before, I think we'll still be relying enough on Hot Streaks that Living Bomb won't be necessary right now.
Finally, what happens if mana becomes a problem? Will Mage Armor be mandatory? If so, what glyphs will we drop? I personally would probably drop Glyph of Pyroblast.


Edit: Spelling is hard. Changed title to be patch, not path. lol