This page describes the gritty details of the what Bitten's SpellFlash: Mage will flash when you are in Fire spec. Download the addon from Curse.com. If you are having any troubles, check the FAQ and if that doesn't help create a ticket. If you have a question that the FAQ doesn't answer, leave a comment on the download page. If you have a suggestion or request to improve the addon, add it or vote for it on the suggestions page.
Fire comes with an unimpressive-looking combustion monitor that can be turned on and off in the options. It appears as white text in the middle of your screen; simply click-and-drag it wherever you like. Though the graphics are simple, the calculations are accurate. The first line shows your current crit rate and the number of ticks combustion would have if cast immediately. The second line shows the estimated total damage of combustion if cast immediately, with the value per non-crit-tick in parentheses.
Important: for Combustion to flash at a reasonable time, you should pay attention to the number in the lower left for a while. In the options you should set "Minimum Combustion Total Damage" to a number that is high, but that is reachable regularly. I cannot tell you exactly how to choose the best number to maximize your DPS with your gear - the best I can say is play with it to find what works best for you.
Spells will flash according to this priority:
This is not currently an AoE rotation for Balance. Feel free to vote for its suggestion.
In addition, these spells will flash under the following conditions:
A lot of research went into these rotations. I logged hours in Simulationcraft maximizing its dps. Hopefully the results of my work increase your dps! If you are handy with simc, you can use my action lists to create stat weights or test gear changes for your character using SpellFlash's rotation (as closely as it can be modeled in simc). If you find improvements to the rotation (with proven numbers in simulation), please let me know!