Throwing in my two cents as well.Originally Posted by KDirtMcGirt
Yes, what you wrote is very true, but for those situations I just use Frostfirebolt.
For example for killing mobs before they get to me, typical Frost mage "strategy", impossible to do with the Glyph.
Just start with FFB, then spam the usual FB cycle.
Mobs will be slowed down just like if you had started with an un-glyphed Frostbolt ^^