TBH materia feels fairly pointless in general for battle roles.

For example:
The gains from Tenacity, Direct Hit and Determination are linear. 24 meld slots exist granting a total of 1440 extra secondary stats with full 470 gear, which grants a damage increase of 4.3%(Tenacity), 6%(Direct Hit) and 5.6%(Determination).

Even Crit, which has a more dynamic scaling, doesn't gain much from 1440. Assuming zero base Crit it would be a 6.67% increase and at high levels of Crit, the gain would not exceed 7.5%.

Skill/Spellspeed for the comfort zone GCD/cast time is pretty much the exception assuming you don't reach that point from gear alone.


On a separate note, the damage reduction from Tenacity suffers from diminishing returns with other damage reduction. Since damage reduction stacking is a multiplicative value, the Tenacity value that would give 10% reduction, actually gives 8% reduction after factoring in the 20% trait reduction. Add in Rampart, the value drops to 6.4%. With Rampart and the 30% skill it drops to 4.48% and if you add in a 20% Shelltron/Raw Intuition the value drops to 3.584%.