I'm curious about that as well, which was why I made that other thread about magic, but it was poorly phrased ^^; There'll probably be differences to the jobs from the Source due to difference in culture, conflicts/wars, and ecosystems.

Scholars/Summoners (Evokers?), or the equivalent, probably have different 'tactics' than we use. Maybe they can use magic like Libra? It might be that summoners can attune to the Light, if Primal energies are lacking, but we don't know if there is much of any Primal energy left, because of the Warriors of Darkness. Maybe Devout are working (devoted) to preserve the forests/elementals acting as a bastion around the inhabitable region not flooded by Light?

Astro will probably be different since stars wouldn't be visible at constant daytime, or maybe they can feel the stars more sensitively. Planets would be visible occasionally, so maybe they use those instead. Maybe they "read" the Light or flow of aether in the sky/lifestream? Or maybe astromancy isn't a thing, and they use Geomancer techniques like in Kugane instead. We don't know yet.

Bards most likely have different songs and stories than on the Source. Maybe they're more like skalds? The Warrior of Darkness equivalent to Bard was Ranger, so maybe they don't use songs. Maybe they're more focused on sniping/trapping Sin Eaters?

They said weather would be different on the First Shard, so that might have an impact on the ecosystems. Botanists probably have different/more advanced skill-sets as the Flood of Light make everything a blank perfection, forcing new techniques and technology to provide reliable harvests.