Fire IV or Fire III ?

[VictorSpoils]

Use Fire III instead of Transpose to switch back to umbral. Also, if you're not at max MP after Blizzard III+IV, throw in a Blizzard I/Thunder.

[Kansene]

Use Fire III instead of Transpose to switch back to umbral. Also, if you're not at max MP after Blizzard III+IV, throw in a Blizzard I/Thunder.

This, pretty much. Also, use Fire I instead of III to refresh the duration of your fire phase, it costs way less and neither of them hit hard, so go with the cheaper one.

Fire I will also turn into paradox later, so it's good to get used to pushing it.

Transpose is mainly used to keep enochian going between fights, or if you somehow royally screwed yourself over with mp somehow.