IMC we've tried the following:
lvl 1-2 = LA +1
lvl 3-5 = LA +2
lvl 6-8 = LA +3
lvl 9-11 = LA +4
etc...
When combined with the rules for buying-off LA in UA, this results in a constant LA of +1 (the character "buys-off" one +1 and gets another in its place), but with a slower progression for...