Ok, so I was trying to start RTL campaign two times already.

After this I have decided to start another campaign just with my cousin. It was only possibility to finish somehow this campaign

We already have three meatings.

Today I found that we have played some things wrong. To be honest the important one

The rule was that after one dungeon finish you don't reset Threat tokens, Powers and Cards in hand... To be honest when I found today that they are not resetet I was a litttle shocked by this, We have 2 dungeons behind us, and it was realy balanced. Suprisingly after first dungeon my cousin took some advantage and before the second one I was preaty sure that he will smash me hard (I was before my first monster upgrade).

To be honest in our first dungeon I was not trying to use my full potential... Sometimes I just found that in one round I can easily kill his personality. But I was trying to play some kind of RPG, and was attacking nearest opponent, don't use traps on low hp personalities etc.

In second dungeon my cousin already have some nice items, and new skills. So I have decided to give a try and check how it will work when I will try hard to kill his guys. And not suprisngly I have earn much more CP than he.

Now when I have read this rule I mention above it looks that life for heroes will be even much harder. Additionaly I will upgrade now my monsters to silver and it will be much much harder.

Let's look on it like this. My Avatar is Beastman Lord I need just 12 threat tokens to reset, my monsters.

Thanks to heroes I am recieving 4 Threat tokens per round... plus 2 cards... It gives possibility to spawn new mosters every 2 rounds. With possibility to spawn mosnters and immedietly move them even if they can't kill heroes (usually I can kill one, or at least heavenly damage one of them), they will for sure slow them so I can spawn new mosters. The thing is that I just want even chances for both of us.

My question is does any of you have some similar fealings, and what have you done with it?

Maybe someone make some modifications to rules which helps heroes?

This sounds right. Things will sway farthre towards the heroes the deeper you get into the tier, then back in your favor as you go into silver. And so on, getting better for the heroes the deeper they are into each tier, as they've had more time to benefit from the new treasure decks.

Are you refering to a "dungeon" as an entire 3 floor affair, or 1 floor of a map?

If you are talking about an entire 3 floor dungeon, then you were already playing it right, threat, power cards etc DO reset between them. Now between each floor is a different story.