Time lapse glitch works but this will only work with a little bit of energy at a time, and with a small amount of time cheated at a time (20 minutes per shot or so), or else the game's servers will recalculate and knock you back into pre-cheat time.

The more scholars that you have to do research as often as possible, the better because research unlocks almost everything.

Do research on Classes to strengthen your team and Artifacts for bonus rewards and dungeons.

It might not be obvious but try to upgrade your Coin and Ember Vaults, and your Coin Scavenger and Ember Baron as soon as possible it will bring you much more needed coins.

Also upgrade your Leadership as quickly as possible to maximize the amount of heroes you can have in your party and the more you have them easier it will be to win.

Heroes are organized by rarity as either common, uncommon, rare, epic or legendary, and the higher the rarity, the tougher they are to find and fight against.

Level new heroes up as wst as possible by taking them to the dungeons that are just easy enough to defeat swiftly.

Keep in mind that when you level up your heroes, they will get an automatic free refill of their health bar at the end of the battle.

And if your commander gains a level in the battle, you will get a free, full automatic energy refill when the battle is over.

Clerics are your most important party members because their healing spells will not only stop you from having to constantly spend coins on healing potions and resurrection scrolls, but they will make it far easier to win tough battles, as well, by keeping other party members alive.