I just looked at iksar images, they don't have much forehead. I guess it depends on which character I'm playing I guess. That's enough research for me. No need to measure.

Like I have irl photos where my forehead is like 1 or 2 cm, but it looks way bigger in the mirror. Not sure how to handle this discrepancy. It can't be both can it?

I personally think EQ2 erudites are pretty much cooler than any of the other fantasy races, they could have taken it a step further and set EQ2 in a world were the EQ2 erudites are the only survivors and they are trying to resurrect the rest of the world/rebuild it after the atmosphere became toxic and the entire planet was blighted by undead because of their war with paineel, and there's like a biodome with kittens they have to repopulate with because the Erudites have become genetically sterile and the only way they can increase pops is by summoning bodies or controlling undead bodies or cloning. But the technology to clone their perfect erudite bodies is failing because the gnomes are all dead and rodcets spaceship is crashed sideways into norrath.