Ghouls leveling..
Around Necropolis, there are also few urban zones with footlockers
Use real time combat, not turn based, they are not hard and real time is faster so you will lvl up faster
Use some easily accessable ammo/weapon (minigun/avenger, grease gun, flamer..) so you rush them and not loose anything valuable
If your hp is low then dont stop, just look for vs encounters
Focus ghouls with best weapons (molotov cocktail > green-red with shotguns and hunting rifles > pistols > others) so they will not kill other ghouls or with low hp
Avoid wasteoftime encouters like ants, dogs..
If you want to push your level hard then make tent near necropolis, bring there few weapons, thousands of ammo and farm for long time.
You dont even need armor if you are looking for vs enco and if some ghoul is attacking you, focus him
Easy for all players include new because they can look for vs enco and kill low hp
With swift leaner and loner 150k+ xp per hour is no problem there
Edit : there are still more and more players which found this leveling but ghouls are in alot zones around so you can still avoid pk