So the Dwarves and the Elvhen/Elvhenan timeline is utterly fucked, but I may have overcomplicated my way out of it?
twot says that the Elves first met the Dwarves in -4600 Ancient, or 3000 FA (founding of Arlathan). Solas says in Trespasser that a war was what triggered the rise of the Evanuris, and Veilguard confirms this was the Titan War. The Veil went up sometime around -3100 Ancient according to twot, meaning the end of the Evanuris' rule.
If that's all true, then the Titan War took place around -4600 Ancient because the Elves met the Dwarves during said war. The Evanuris rose to power after this, but only ruled for a maximum of 1600 years, part of which was taken up by Solas' rebellion.
For context, Tevinter has been around for 2046 years in Veilguard, and Orlais for 1105 years.
However, my fix to this (non) issue, is that the Dwarves the Elves did meet/know of each other prior to -4600 Ancient. If we agree with Veilguard's concept art, then the Dwarves were the inspiration for the Elves,
It's just that the Dwarves they met in -4600 Ancient were a new people, fresh out of the Titan's control, and with individual minds. aka modern Dwarves.
There's records of the Elves believing that the Dwarves were soulless, and Veilguard suggests that was a misconception caused by Isatunoll, a hivemind that connected Dwarves and Titans. The Elves may have even known to some extent what Isatunoll was, as Bellara and Harding identify the word used in ancient elvhen lullabys.
This interpretation would allow the Titan War to happen years prior to -4600 Ancient, even prior to Arlathan in -7600 Ancient. Which allows room for the Evanuris to rule for a significantly longer time period. If we considered the beginning of the Evanuris' rule to be the founding of Arlathan, in -7600 Ancient, then they could have ruled for as long as 4500 years.
