I hate having to get lucky to level up- a pile of defeated foes lie at my feet but I'm the same dumb guy that started because I didn't get a 20. Are there any better leveling triggers that won't unbalance the game?
19 and 20?
You could also level-up , maybe with 10-15 XP(not sure what would be the correct number).
It just so epic to get the 20 , so I'll still prone to the normal rules