hmm, rk isnt the best when early farming.
what you can try is get an HBP if you dont have one yet and just greed while leveling. sell the loots with your smith and overcharge. sell to people if the ti loots are sellable, otherwise, npc them. the previous mid ti was a good example. vanberk drops bloody runes . i was farming on mid ti and made 1m per 15mins solely on npc loots.
on higher levels, you can try instances. 120 is for thanatos gears. you can make use of it for leeching.
https://irowiki.org/wiki/Ghost_Palace
you can also maybe try the lower levels of et for a chance at mvp card. just do once a week as far as you can. you can do it after you lvl up so no exp lost when dying. take tokens if vip.