Too much memorization, not enough RNG on raid fights

[linayar]

In ARR titan. There are tons of videos of people being off the AOE markers far in advanced who then get thrown off the arena.
Anytime through the games history there are videos of fights where people are off aoes but still get clipped by them. Including in my group from last night fighting emerald ex.

Just to clarify, are they solely using the AOE marker to judge whether they dodged the attack or did they watch the cast bar too?

The AOE marker shows you the area of effect of the attack, but it's the cast bar that signals the attack itself (if it has a cast bar). So you need to move out of the AOE marker before the cast bar (whether visible or invisible) finishes, and if people are not paying attention or try to keep uptime until the last seconds, that's not really a server tick issue.