With Fire IV coming along...what happens to Flare?

[Sleigh]

Don't forget that Fire IV (and Blizzard IV for that matters) do not refresh astral/Umbral stacks. In short, you may use only one, 2 max every stack refresh.

Not quite. With Leylines/Selene you can do 3 F4s in a row into F1, or if you have a Firestarter ready, or if you are at the end of your rotation and as long as you are in AH3 when you press B3 it has the effect you want.