Your doing an exploit to the game, of course it's going to take longer. You're lucky the game even allows you to do that and your complaining about how long it takes? If you play the way it's designed or in a more realistic manner, you don't have to wait so long.
What level guys were you luring back to the city? At level 4 you should be able to take on an even level mob of 5 or 6 relatively easy. This is a turn-based RPG game. For people who totally LOVE Turn Based games. Thus the references you see in every review about Oldschool, etc etc. It's for people who like to strategize and plan out their moves tediously. You know? Like Chess? It's not Diablo. It's not an Action RPG. That is whole other demographic of gamers.