Determination vs spell speed and resetting stats at level 50 questions

[Zaft]

snip

Nettle's post essentially assumes that neither you nor your tank know what you're doing in the fight and therefore have to rely on spell speed to save the day. The reality is that every fight in this game is choreographed in such a way that spell speed means nothing. If your spell went off too late, it's your fault for not pre-casting it. You know exactly when an attack is coming, down to the second for most abilities (some are pushed back by animations).