The standard EJ Fire spec only uses 1/2 Pyromania because of the current bug with it, so there’s your third point, which gets you to 3/3 (there’s already 1/3, which is why people already have Clearcasting procs in WOL parses).
I don’t know that you understand how Hot Streak and Impact work. Hot Streak, which is the most important one, cause the mage to be able to cast a 100% mana free instant pyroblast. Pyroblast does by far the most burst damage of fire mage’s fire spells. Impact allows for a free resetting of Fire Blast, plus an AOE fire effect.
Hot Streak and Fire Blast procs off of crits, same as Arcane Missiles which you give up when you take the Hot Streak talent.
Re-do your calculations using the possibility of Hot Streaks instead of simply looking at it as a mana deficiency problem. This is what EJ has done, and is why they recommend Improved Scorch instead of Clearcasting.
I know exactly how Hot Streak and Impact work. Thanks. I’ll try to explain what I’m talking about again here:
If during the course of a Fight, my Mage friend has cast 40 Scorches, he has saved 40 * 8% base mana if he has 2/2 Imp Scorch.
If during that fight he had instead had 3/3 Clearcasting, one would expect that he would have proc’d Clearcasting three times as many times (minus overwritten procs, plus 1% because the third point gives you 4%, from 6% to 10%, but let’s set that aside for now).
Let’s say he proc’d Clearcasting fifteen times on the fight where he cast a total of 40 Scorches, and let us assume that he hit zero mana at the very end of the fight (ideal case, because otherwise, he should have cast fewer Scorches).
With 2/2 Imp Scorch, this saved him 40 * 8 base mana total, and allowed him to cast until the kill.
With 3/3 Clearcasting, he would have expected to get around 30 more Clearcasting procs, saving him (assuming each of them was used on Fireball) 30 * 16% base mana total, significantly higher than Imp Scorch, which would have allowed him to chain-cast Fireball throughout the fight.
There are two variables I can see that I haven’t accounted for. One of them is the incidence of Clearcasting overwriting itself, which I can’t calculate, and the other is the various spell costs (Flamestrike is 30%, Blast Wave is 7%, Fire Blast is 21%, Combustion seems to be free, and so is Pyroblast, so neither of those should consume Clearcasting), which I also can’t really account for other than to go through the parses again, average out the costs, and treat Clearcasting as a passive cost-reduction, which is how it was calculated in the Wrath/BC spreadsheets.
What am I missing here?