Please add this game to the list. 
I found that you can find the skills cool down (its a double type in secons so if you need to wait 1 hour search for 3600, i find that its useful to search for a range then look for the values that go down) its really useful for the 6 skill that multipy your DPS by 1.05, so you can exploit it.

I tried to speedhack, but game freezes after few seconds and you need to reload

I was only able to find the skill cooldown timer, and the skill buff timer.  All using cheat engine, value type double, and in seconds.

I wasnt able to change any of the other countdowns(daily quest countdown, arena chests countdown, etc)

None of the resource values were changeable either, but maybe someone more experienced will have better luck where I failed.

searching for exact  1.05 double yielded ~6500 results.  changin the top 1.05 of that list resulted in no change to dps

I think it's a ban mechanism or something, did it on a throwaway account and it triggered after relog.
 

This tip is not actually a hack, it's a technique to avoid a game mechanique which concerns a randomness issue with upgrading the quality of your heroes. It's frustrating that most of the time player will get worthless heroes on the picking list after defeating a daily boss.

Usefull tip about how to gain upgraded hero quality by up to legendary5: 

• reset the world using a dark ritual
• recruit maximum 3 heroes
• defeat the daily boss
• having only 3 heroes recruited will let you which exactly hero you want to upgrade its quality
• choose one of your highest hero which also have a dmg/lvl %
• reset the daily boss with potions
• repeat the previous steps

The gamechanger is to get a Legendary 2 hero which increases the total dps of the hero by 10kx

You're right about that mr. khadx.

What tips should i think about???: The hacks here can be detected even by some othe players by checking your profile or by your envious clanmates. So USE THEM WITH CAUTION you might get banned!

The gold can be hacked for real, not just the display numbers:

• get a fresh dark ritual
• do not hire any hero with income bonuses yet.
• go to the statistics and search for the gold multiplier value as double
• recruit and upgrade a wealthy hero(Ulla, King Midas, Djinbo, etc) while narrowing your searches to the income multiplier value.
• Save at least 1 income upgrade for later, or some souls if you have the income artifact!
• draw the adress value down to the adress list
• lock it by marking the "active" checkbox from the left side
• change the value to like e45(I need to get e180 to max my strongest hero)
• kill few monsters
• after you get the amount of gold you need, You must undo the hack, uncheck the active checkmark from the cheat engine and buy another income upgrade of a hero(by upgrading your hero to the required level for it) or upgrade an income artifact by spending some souls.
• the income multiplier value will come back to normal, and let's hope your hack was successfully undetected
• do not auto-advance to higher zone
• do not get over e299gold!!!

How to manually save your game progression after doing a hack:
Clans>My Profile>Click the pencil icon>Save

I'm still working to see on how to make the speed hack works. So far I've noticed that using it  it will roll back your game progress to a point far back in the past
  EDIT notice: IF you buy/upgrade an artifact some of the old hacked adresses will not be used by the game anymore, and you'll have to search for the newer ones

yeah it was possible. Today something in the game was changed. Besides the spells' cooldown i can't hack any value