While playing in Monster Sweeperz, we noticed that the energy depleted quite fast in special dungeons. In each dungeon, the energy cost ranging from 20 to 45 per round.
Here a tip on how to save energy while in these dungeons.
Always look for partner with the “Bonus” word, it will reduce the energy cost by about 30%. If you noticed from the screenshot above, the energy cost from 15 have dropped to 10.