On the individual stats, I'd trust the number crunchers unless you can crunch the numbers yourself. As odds are there are points where diminishing returns kick into play as well as synergistic relations.

The problem is unless you can offhandedly math out the difference from your damage done from having more of Det/DH compared to the damage you let the healer do by preventing some amount of damage while also doing less damage yourself, it gets really hard to say. Even more so when you further start trying to account for the multiplicative nature of Crit and Skill/Spellspeed as well.

This link might help out, I hope its fairly accurate, as it is still pretty recent.
https://www.reddit.com/r/ffxiv/comme...tat_intervals/