Hi Shayla,

I would say the stats that take precedence over anything like Spell Speed are:
The weapon's Spell Damage/Magic Damage
Your discipline's primary stat (Mind for Conjurer base, Scholar) (Intelligence for Thaumaturge base, Arcanist, and Summoner).

Then, depending on priority, these stats have similar weight for spell performance: Determination (small improvement that is always on), Critical Hit Rating (chance for significant output), and Spell Speed (quicker reaction times).

Based on the tables found on Dancing Mad's Seiken Valk, it would take a good chunk of Spell Speed to reach even a 0.5 second cast speed increase and there may not be enough gear in the game at the moment to reach it without abilities (abilities like Presence of Mind).