I need a good BLM spell rotation.. Been gone for a year..

[Rongway]

although keeping enochian up is a boost to dps for the last 2 levels while levelling.

Before 60, putting it up is a boost; keeping it up isn't.

Refreshing Enochian with Blizzard IV
Blizzard III, Thunder (1.05 * T potency), Blizzard IV (294), Fire III (252), Fire (X casts * 340), possible Fire III procs (Y procs * 453)

Letting Enochian fall off
Blizzard III, Thunder (1.05 * T potency), Fire III (240), Fire ((X + 1 casts) * 324), possible Fire III procs ((Y + 0.4 procs) * 432)


The X+1 and Y+0.4 will depend on piety / max MP, and I don't remember those numbers off the top of my head for Lv58, and the 1.05 multiplier could persist another cast or two past where I included it in the falling off sequence, depending on speed and buffs.
But you have to extend these sequences out about 18 casts before the "let it fall" one becomes worse than the "keep it up" one.