Killer combo early on till freedom islands
 

2 half stacks of marauders
full stack royal snakes
full stack vampires
+ whatever value adding units
vampire can be changed for ghosts

I used this combo with warrior on impossible and u will be amazed about the amount of gold u gather extra not to mention the minimum loses.

RT are too rare to find, same for vampires.
Problem with games like kb than it force too use units that can hit while cannot be hit (no retaliate, archers, etc.), replenish your forces can be very expensive.

maraudeurs+gift=infinite money

Vampires are guarentee find in the swamps if not at the buildings u find coffins. As far as I know marauders were always in the game early one. I didn' t used them the whole game during the first play through though, lol.

I didn' t use gifts all the time only well I had lots of mana. I have 4 times the skills with 2 half stacks already

Add one friendly Gremlin in the equation, and it can really break the KB monetary system :)

I only learned about this trick myself yesterday - and the way you say it still keeps it "shrouded in mystery" = not everyone manages to figure out the little trick/bug/exploit with one friendly Gremlin tower...

imba army at early level is:
* Demons (randomly spawn in a tavern)
* Sacrifice spell

How much you get from coffins? Not enough and sacrifice is not guarantee spell too. Don't take me wrong combo is good but not guarantee :).

Yeah. With my luck (i must have broken a pile of mirrors in my youth), I'll find Sacrifice on the very last battle in this game.
But hey, after weeks of avid playing, I finally found Resurrect in Kordor (was sitting innocenly under a snow-covered pine tree :D ). I was so darn happy, that I made a screenshot! Not 15 minutes later, some stupid huge fish ate me and I found there the Phantom spell :D
You never know, 'life turns in a dime' as they say... ;)

The smart ones (like you) will learn it eventually, the lazy ones (like me) will learn about it on the forum :D