BLM Question

[Allyrion]

Of course you should be adding Transpose into your rotation to keep your MP up. Waiting for MP = No dps

Transpose falls by the waist side when you get Blizzard III and Fire III. They remove the opposite buff and grant a full stack of their own type (for example, Blizzard III can be cast with Astral III up and after you'll be at Umbral III).
This is better than transpose which would only give you one stack opposite buff.
I've found it only useful when you're moving and you want to regen since you can't cast anyway. Also, when you need to aoe adds it might just be better to use Transpose.