Ulu1 will net you the highest average mesos income per hour without selling leech. Ulu2 map is easier to navigate than ulu1, but the income is slightly lower (maybe 3~5m per hour less), but easier to sell leech than ulu1. Petri's raw npc income per hour is a lot less than ulu1/2, but you can charge premium for selling leech. Some maps in ToT maybe good because of scrolls drop, but NPC is a pain compared to Ulu1/2/petri. You can do summon farm at saitie and stopper maps as well. If i can think of anything else I'll add onto this.
Memory Lane 5 for helm int 60%, usually gain 10-12/H (8.5m each) or up to 15 if you telecast. Their equips drops aren't comparable to ULU1/2 maps, but goodly Spartas, Dark Valkyrie, and Valkyrie Skirts should all net you a nice additional amount. All things considered, you should expect up to 140M/H on average if you are efficient. Another map I personally like very much is Zipangu: A Desolate Cemetery, the Nightghosts drops TONS of cape int 60%- up to 35 on a good hour, but usually 25-30. Other than that, you will get a lot of Red Katanas, and although their level requirement is pretty low they still go for very high price due to their attack speed of 4. One last thing you should be aware of are the Dark Cloud Fox on the map, they don't drop anything valuable but you can exchange their ETC drop for a very small chance of receiving a pair of BWG (550M). Average gain on this map is about the same as Lane 5.
