So first off you'll need Notepad++ it's free and I highly suggest it for anyone who likes editing game values to cheat / adjust games like this.

Once you get Notepad++ you'll want to open whatever your file location for Dungeon Dreams is, you can do so easily by right clicking the game in your steam library, properties, and open file location.

Once there, select the files www then data, should look something like this D:\Steam\steamapps\common\Dungeon Dreams\www\data unless you put it in your C: drive then... you'll figure it out.

The files you want to mainly look at are Armors.json, Weapons.json, and Items.json. Open them in Notepad++ not the normal Notepad.

The lines of code look something like this...

{"id":247,"animationId":7,"description":"Dark energy. It's worth quite a buck.","etypeId":1,"traits":[{"code":31,"dataId":9,"value":0}],"iconIndex":97,"name":"Sword of the Dead","note":"","params":[300,300,300,300,300,300,300,300],"price":4000,"wtypeId":5},

What you want to look at is the box that looks like [0,0,0,0,14,0,0,0] (the above is a modded version i'm toying with.)

Honestly have not tested what each value corresponds to, though you'll see it affects all your base stats by the given number. Having the value of one modded item at 100 across the board for one item makes for a good weapon / armor up till the 13+ floors. 300+ is good for the 15-23 floors. anything higher then 300 on a single item and you'll be running down super easy street for this game. Once your total stats start hitting over 400 you may as well be playing with god-mode on.

Fun thing to note "wtypeId":5}, is the weapon id, in this example I changed the sword to 5 (staff) instead of 2 (sword) because i wanted my necromancer to have a undead sword instead of the normal staffs in game. You can do the same for armor if you want your mage wearing a certain set of class specific armor outside your standard class armor restrictions.

Another thing to note, lets say you have a spare set of common armor or weapon in your inventory, modifying "price":4000, to -4000 will mean the vendor will pay you to buy the item. Though you can't sell items with - modifiers, so you'll have to change it back to sell it if you don't want it in your inventory. Obviously you could also make the basic life vile worth 100000000 and as an alchemist sell them or any item for that matter to cap out your gold.

Obviously you can do a lot of other fun stuff like move around class abilities to create a death knight or a assassin with healing abilities.

Though i'll let you have a go at that. Hope this little DIY guide helped you out.
I don't plan to update this as it really is an easy DIY, but if you find something cool out and throw it in the comments. I'll be sure to include it.

P.S. Because I know someones going to make this mistake. After any edits, save not save as. Also restart the game after any changes to put them into affect.