Well, the only thing left to do now is to play around with the values I guess. I haven't done any modding at all, but it looks really easy-to-do stuff.
EDIT: And indeed it is
In like 10 mins I modded the game for a warrior who starts with 50 runes (all kinds), chests on the battlefield yield item each time, has armageddon spell that inflicts 250k damage at lvl 3 and costs 0 mana
It is simply so easy, that it's laughable. Just don't forget to backup the original file.