I have a new mage, fire spec (insofar as 13 talent points is a "spec") and I just got my shiny new Scorch spell. I can see its usefullness in PVP given the short cast time and I get that it's mana efficient, but since in solo PVE a fire mage's first job is to kill things fast before they can touch you (yes?) I don't see its place versus the stronger damage spells.
When I'm soloing I generally open with Pyroblast then Fireball stuff til it's dead, with a Fire Blast/Frost Nova thrown in there if the mob(s) get to me. Once I get Improved Scorch I'd want to use it to keep the debuff up, but I don't see how else it would fit into my rotation (insofar as spamming one spell is a "rotation").
Yet people talk about this spell as if it's capable of turning back time and rolling that ball back from under Bill Buckner's knees and into his glove, so I want to make sure I'm not missing anything. Where do you experienced mages place this spell in everyday PVE?