Hitting often vs less often, doesnt equate to more enmity, unless the person hitting often is dealing more overall dmg, or has an enmity modifier.
Hitting 1st only matters, if you're almost an entire GCD ahead, to which theres no way in which to "catch up" unless there's a DPS difference in player performance, job, or enmity modifiers. (total DPS in the fight is still effected by "hitting 1st" and the threat gauge will reflect the same results as a DPS meter would)
Plenty of DNCs have out DPSed BLMs and SAMs, solely due to factors such as "performance" or low level scaling, where most newer jobs tend to deal more dmg in low level dungeons, than older jobs that were balanced for them.
Lastly, other factors that increase enmity, but arent signs of DPS, would be buffs/debuffs (with no dmg attached) though I believe most of them are the smallest amount possible (1 point), along with heals. (DNC has a party wide heal, which equates threat. (I believe heals are roughly 50% enmity)) Heals are the primary way in which the threat meter can be off as a means to measure DPS.
But considering theres no longer threat reduction abilities, im inclined to disagree with your statement, as unfortunate it is for the OP. Enmity gauge is rather "acceptable" as gauging your performance compared to others. (If all you want to know is if you're DPS is higher or lower)
Its NOT however a very great tool at it, since tank threat is so high its impossible to tell if your ahead/behind the other DPS by a large margin, or by something as low as 0.1%.
And not all jobs are equal in maximum output, nor are they equal in their performance on a "dungeon to dungeon"/"boss to boss" basis. Sometimes buffs/attacks line up differently for different fights. (In savage, they tend to line up a bit better)
