Well I see the point, nevrax wants us to see the named mobs as uniqe ones, so it would be only fair if they can't be chain-killed like it was before. I even like the idea with more XP for them, but you should also increase the XP for supreme boss mobs then maybe 6 or 7times as normal, because they really are more unique the named mobs

The random spawn and the spawntime is ok, I think there is only one think that should be considered. They should not spawn anywere on the map, somedays ago I was strucked by the Zerx named while crafting at a hawker in an Outpost, Zatcheln and Vispa went along the Kamiporter in Groove of Confusion, and such things shouldn happen. While the named mobs run arround as they want there aren't any safe places anymore. So they should stay in an area of there races. And for the Highlvl teams more choice mobs would be perfekt maybe 2 or 3 in every group of "normal" mobs that would also make the hyperdimensional prices of wepons and everything go down because you can also make good ones with choice mats, but you can't forrage mats for speed for weapons for example.