Their is no mine near Nekr at east location. At least not showing up.Their is a tabaco farm by Apocolip cult west coast area of Ac.Not sure if you can craft cigs, I was unable to find it in menue and not able to craft at bench.
What on earth is marigolds?You mean Mariposa(military base)?If so,then you need to find a second elevator a bit south of the first one on the third floor.There are no enemies.