What is the Game about?
Kartharka is not generic Fantasy!
Lair of Sword and Sorcery is not a "retroclone",
It is not a throwback game, it is not a reworking of a current system, nor is it made to be "compatible" with any current system. It is it's own creation.
As a game master (Demon Lord in the language of Kartharka) you can use anything you want from anywhere. See an adventure you like? Rip out everything you want, make some stats up on the fly and run it is Lair of Sword and Sorcery. You don't need a compatibility chart, or special balancing calculations, just make it all up and throw it at the players.
Slavish worshiping of Game Balance is the death of creativity,
As long as there is trust between the Demon Lord and the players all can have fun no matter what the enemies. It is this lack of trust which has lead to so much Rule bloat in other systems endlessly adding rules and reprinting edited rulebooks in the quest for perfect balance.
As for the Demon Lord, be worthy of that trust. Let the players make real choices about what happens, if they want to do something then damn well let them try, if they want to steer the world to bow to their whims then good, that is what heroes are meant to do.
The players and the Demon Lord are both there to create a world, not to heap the characters in treasure and let them always win, or to be so overbearing that they must run from every encounter and are doomed to scrape and save just to make enough to keep their characters fed.
This game is meant to be played with friends, friends who trust each other and who want to have fun together.
But enough rambling, What is Lair of Sword and Sorcery, and it's game world Kartharka all about?
The rules are meant to be just enough of a framework for everyone to have a good time. A lot of the time you'll be making everything up as you go along but there should be just enough of a framework that all can feel that any decisions are at least fair to the spirit of adventure.
Lair is very much a do it yourself system but fear not, there is nothing out there yet to compare yourself too. Want to make up your own monsters, go ahead, your crudely drawn monster on a piece of construction paper isn't going to look any worse than ours when we're playing. Want to make a miniature for that monster? Or for one from the books? Go ahead.
If you want to cut the head off a tiger and glue to the body of a dinosaur and throw it down on the board don't worry, there are no official Lair of sword and sorcery miniatures so it'll look no worse than the players miniatures raided from Lego sets or from play sets grabbed at the dollar store.
What is important is that what you are representing is cool itself. A dinosaur with a tiger head? Awesome! You can use the stats for a dinosaur or the tiger, or both, or a whole new set. The players will have to figure out how the heck their going to kill that thing and they'll have fun doing it, especially when you try to figure out exactly what it's roar sounds like.