Was in a world quest where the base drop was a normal raid drop. We cleared it with 14 people gathered in the zone. Mobs where about as strong as raid trash.
Break down of loot was
2 mythic ilv
1 heroic ilv
11 normal raid ilv.
Don't currently know if the class hall upgrades effect ilv of mythic drops or the spawn rates of quests like this but I figured this is the kind of things people want to know about world quests. The quest itself seems like you could do it with just a tank and healer though the more dps you throw at it the easier/quicker it goes.