Back when I considered going with an iksar necromancer as my main, and as someone who loves Neriak, I did some extensive scouting of the city with a lowbie alt and wrote the results of my adventures here. This should answer any questions you have regarding Neriak faction as lizard.
https://www.project1999.com/forums/s...7&postcount=10
As far as lightstones go, you should be able to turn them in with no issues.
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