Leveling any type of mule to 80+

HI there,

I was wondering, when you are trying to quickly level a HS mule to 81, i know by about lv. 60 you can start leeching it, but to get your char from 20 to 60, what is the best way to do so?

Lv. 15-30 - KPQ???
Lv. 30-51 - CPQ
Lv. 51 - 60?

Or is there a better method of leveling during the 3 ranges ppl can share?

Thanks in advance!