How do they work and how long,when to use?

http://datbear.com/silentxero/ls/sigs/xer0/map2.jpg map lvl cap here

https://i.imgur.com/2fv2ivJ.png mobs per map here

http://datbear.com/silentxero/ls/sigs/xer0/objective.jpg what quest on maps function



There is 100 mobs in LS, and 10 map types each with 10 of those mobs.
There is no flashes , no trapdoors and no wells in maps. Also no mobs on explored areas. At the end of the Map will be a huge treasure chest , as where on maze completion you get the maps.

Maps are useable up to 10 levels above mob cap, then you notice massive drop penalty.

huge might be the wrong word here