Farming place: House-> Visit Neighbor
Build any, Lvl any ( 80+ might be smart), but the more HP you got, the better.
Idea find a high lvl guard to kill with ally assist Zorbak + Artix.
Best Guard to kill: Mighty shadow Roc: 2290 hp, high defences, but Ally Assist autohits.
Very High xp 3,22 million. Downside hard to find, fleeing when encountering gold guards is encouraged. On low lvl on average very very fast. It's possible to overcap by many times the cap.
Equipment: You need a house, shadow equipment, offence is not needed: Shadow of doubt, luminous shield, crystal of restless shadow or similar. Ready inventory before battle is a good idea