We dont know the stat weights. We do know that Det got a buff, Crit stayed the same, Direct Hit is pretty amazing in certain circumstances, and Spell Speed is the bastard stepchild that nobody except BLM can agree on.

Det is roughly 1% damage and healing boost per 166.67 points.

Crit is roughly 1% change and damage boost per 108.5 points.

Direct Hit is... Complicated.

Spell Speed is ... .. .

At this point, you're guessing, or doing trial and error on dummies and in ex's. Maybe find some well rated scholars on fflogs, and see what they meld?