Dominions and the final leyline boss (God? Seraphim? Smiley Face Guy?) cause severe lag when on the screen. I think it's something to do with their strange, shifting models, perhaps they have a high polygon count?
For dominions it's less of an issue because they're not much of a threat and don't even attack you, but during the God fight it's kind of a big deal if the game becomes a powerpoint presentation
I don't know how to include the logs, as I cannot find the location on Linux. I am on Linux Fedora KDE Plasma Version 43.
new update will have the option anyways