https://everquest.allakhazam.com/db/...tml?zstrat=942
Turns out the Dead Hills were a part of the Call of the Forsaken expansion on live EQ.
Also, The Serpent's Spine mountainous region is basically adjacent to the Rujarkian hills and would be split and disputed by factions somewhere around Kith. Admittedly, according to classic EQ geography, there probably isn't enough land for all the zones added to those areas in LDoN and TSS expansions, but I have no way to scale the actual dead space between the classic zones to the zones themselves.