BLM opening rotation?

[dragonfire8974]

So, I've been told that the opening rotation should be

Thunder # (time cast as tank pulls)
Fire 3, (Raging strikes) Fire 1x 4-5 (pot after first Fire 1), Swiftcast Flare, Convert, Fire, Blizz, Thunder(then back to normal rotation)

I've been watching some hardcore raid progression groups and I see their BLM use

Blizzard 3, Thunder 2/3 and THEN go into the rotation I mentioned. Is that a DPS increase? Should I mimic that instead?

Source: https://www.youtube.com/watch?v=7heP...TQj13CHjJxD04w

This is a way to limit dmg output at the beginning so that tank can get hate. other opener is straight casting Thunder 3 without bliz 3 in front of it, trying to time it for when the tank hits with shield lob or some such