BLM Rotations

[Kimura410]

Im not understanding the thought process behind casting blizzard III first. Is this so you can cast fire III faster?

My single rotation lately has been this: Fire III pre cast before tank pulls. Swiftcast>Raging strikes>Thunder III(so that dots are buffed, and the thunder is instant casted)>then I do my fires, then Blizzard III, thunder II since its quicker, then fire III>Fires etc.

Isn't this better? This allows me to be in astral fire III right off the bat. This then allows my thunder to be instant casted, and the dots are buffed with RS. This also allows me to cast some fires and hopefully procs with RS on. Not to mention, If I get a thundercloud during RS, its buffed dots all over again, along with the buffed thunder spell bonus. The only downfall to this I foresee is not having SC for a flare, but you can just do it on the next rotation. Or would the damage be more from a RS flare than a RS thunder dot ticking? Guess Ill have to do some testing, but Ive been doing great damage with this set up.