Crit>direct hit> det> spell speed.
Materia matters, but your opener and rotation may be off and that's what is ultimately undermining you.
I personally use
this opener, moving Displacement to after Verflare or Verholy. Using double Scatter for 4+ targets and Scatter to alternating white or black spells at 3 targets. Wait for 9x/9x for 3+ targets, popping Embolden, Enchanted Moulinet once, Manafication, Enchanted Moulinet three more times.
If you were doing savage raids, would suggest lining up Embolden for trick and raid bursts, but outside of it, there's no real reason to do this and can use Embolden for personal/greedy DPS increases.