Does resetting make sense at all? I resetted twice before Level 100, but now just keep going and find this more rewarding...
In the end, 5 hours of playing will give me 100% more damage on my dmg-dealer, that is equivalent to ~20,000 hero levels... and goign throug all stages takes longer as I need to be actively involved in the game (there is no option to skip the first 80 levels, or have so much money at the start to just go right through). Also, by going on I am getting chests every 5 levels which gets me further.
I went through level 100 on Monday and am at 131 now. Getting 5 levels up has not been taking longer from stage to stage. I think I just keep going until I hit another wall (which I dont think exists due to the 5hours of playing = 100% more damage)